We need 12 square tiles of 2ft x 2ft to completely cover the rectangular floor.
How to find the number of squares?
To determine how many square tiles are needed to cover the rectangular floor, we need to calculate the total area of the rectangular floor and then divide it by the area of one tile.
The rectangular floor has a length of 12 ft and a width of 4 ft, so the total area is:
Area = length x width
Area = 12 ft x 4 ft
Area = 48 square feet
Each square tile has an area of 2 ft x 2 ft = 4 square feet. To cover the rectangular floor, we need to divide the total area of the floor by the area of one tile:
Number of tiles = Total area / Area of one tile
Number of tiles = 48 square feet / 4 square feet per tile
Number of tiles = 12 tiles
Therefore, we need 12 square tiles of 2ft x 2ft to completely cover the rectangular floor. It is important to note that since the dimensions of the tiles are a factor of the dimensions of the floor, the tiles will fit perfectly and there will be no wastage.
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f(x) = 2x - 3 and g(x) = x - 1.
Find f((g(x)) - g(f(2))
Answer:
(f + g)(x) = I2x + 1I + 1 ⇒ C
Step-by-step explanation:
∵ f(x) = I2x + 1I + 3
∵ g(x) = -2
→ We need to find (f + g)(x), which means add the two functions
∵ (f + g)(x) = f(x) + g(x)
→ Substitute the right side of each function on the right side
∴ (f + g)(x) = I2x + 1l + 3 + (-2)
→ Remember (+)(-) = (-)
∴ (f + g)(x) = I2x + 1I + 3 - 2
→ Add the like terms in the right side
∵ (f + g)(x) = I2x + 1I + (3 - 2)
∴ (f + g)(x) = I2x + 1I + 1
i hope this work for you
box with 2 red and 1 blue ball pick one randomly and replace with blue what is the expected number to get rid of all red balls
The expected number is 1, that means that if you randomly pick one ball and replace it with a blue ball, then you have a greater than 50/50 chance of eliminating all the red balls.
The expected number of blue balls needed to eliminate all red balls is calculated using the formula\(n = (x-1)/(y-1)\). In this scenario, x = 3 (the total number of balls in the box) and y = 2 (the number of red balls). Therefore, n = (3-1)/(2-1), which equals 1. So, the expected number of blue balls needed to eliminate all red balls is 1.
To illustrate this, imagine a box with 3 balls: 2 red and 1 blue. If you randomly pick one ball and replace it with a blue ball, then you have a 50/50 chance of eliminating all the red balls. If the ball you pick is red, then you need to pick another ball and replace it with a blue ball to get rid of the remaining red ball. This means that you need a total of 2 blue balls to get rid of all the red balls. However, since the expected number is 1, that means that if you randomly pick one ball and replace it with a blue ball, then you have a greater than 50/50 chance of eliminating all the red balls.
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complete question
What is the expected number of blue balls needed to eliminate all red balls from a box with 3 balls, 2 of which are red?
A random sample of 100 adults aged 18 years or older were given a list of ice cream flavors and were asked to list which flavors they liked. The responses are given below. Chocolate 45 Strawberry 42 Vanilla 23 Mocha 19 Which of the following graphs would be most appropriate for visually displaying the results? Pie Chart Frequency Bar Graph Relative Frequency Bar Graph
The most appropriate graph to visualize the information is a PIE CHART. The frequency bar graph makes an independent bar of each fruit each, while it is ideal, it is not easy to identify the total or percentage of each.
Both charts could be used to make a display of the information given.
The frequency bar graph makes an independent bar of each fruit each, while it is ideal, it is not easy to identify the total or percentage of each.
The pie chart could be used to represent a whole of the 100 fruits as a single circle and divides the circle into parts based on the number of fruit belonging to each type including their respective percentages.
Also, since the number of fruits/types are just 5, using a pie chart gives a more accurate and readable visual representation of the information.
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What contributes to the movement of air masses?
Answer:
I think it’s air pressure differences
Step-by-step explanation:
Put these numbers in order from least to greatest
By writing the fractions as decimals, we will see that the numbers ordered from least to greatest are:
-5, 2/16, 23/40
How to order the numbers?The 3 numbers given are:
-5
23/40
2/16
The numbers should be ordered as they appear on a number line (from left to right)
The smaller number is, obviously, the negative one, so the thing that we need to check now is what of the two fractions is smaller.
To do so, we can write them as decimals:
23/40 = 0.575
2/16 = 0.125
So the smaller one is 2/16 and then comes 23/40
Then the numbers ordered from smaller to larger are:
-5, 2/16, 23/40
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The mean yield of corn in the United States is about 135 bushels per acre. A survey of 50 farmers this year gives a sample mean yield of x = 138.4 bushels per acre. We want to know whether this is good evidence that the national mean this year is not 135 bushels per acre. Assume that the farmers surveyed are an SRS from the population of all commercial corn growers and that the standard deviation of the yield in this population is on 10 bushels per acre.
Required:
a. Conduct a hypothesis test to determine if the corn yield has changed using 0.05 as significant level.
b. Write out the hypotheses and report the P-value. Are you convinced that the population mean is not 135 bushels per acre?
Answer:
The null and alternative hypothesis are:
\(H_0: \mu=135\\\\H_a:\mu\neq 135\)
P-value = 0.0162.
Yes, there is enough evidence to support the claim that the corn yield is significantly different from 135 bushels per acre.
Step-by-step explanation:
This is a hypothesis test for the population mean.
The claim is that the corn yield is significantly different from 135 bushels per acre.
Then, as it is a two-tailed test (we are looking if the yield has changed) the null and alternative hypothesis are:
\(H_0: \mu=135\\\\H_a:\mu\neq 135\)
The significance level is 0.05.
The sample has a size n=50.
The sample mean is M=138.4.
The standard deviation of the population is known and has a value of σ=10.
We can calculate the standard error as:
\(\sigma_M=\dfrac{\sigma}{\sqrt{n}}=\dfrac{10}{\sqrt{50}}=1.414\)
Then, we can calculate the z-statistic as:
\(z=\dfrac{M-\mu}{\sigma_M}=\dfrac{138.4-135}{1.414}=\dfrac{3.4}{1.414}=2.4\)
This test is a two-tailed test, so the P-value for this test is calculated as:
\(\text{P-value}=2\cdot P(z>2.4)=0.0162\)
As the P-value (0.0162) is smaller than the significance level (0.05), the effect is significant.
The null hypothesis is rejected.
There is enough evidence to support the claim that the corn yield is significantly different from 135 bushels per acre.
Todd rolled a 12-sided die marked with the numbers 1 to 12. These are his experimental probabilities.
P(odd number) = 18/48
P(greater than 8) = 16/48
P(9) = 12/48
1. Which experimental probability matches the theoretical probability exactly?
2. Which experimental probability is farthest from the theoretical probability?
The experimental probability farthest from the theoretical probability is P(greater than 8). The theoretical probability of rolling a 9 is 1/12 because there is one 9 out of twelve total possible outcomes.
Experimental probability refers to the probability of an event based on data acquired from repeated trials or experiments.
Theoretical probability is the probability of an event occurring based on logical reasoning or prior knowledge. In Todd’s case, he rolled a 12-sided die marked with the numbers 1 to 12.
The probabilities are as follows:P(odd number) = 18/48P(greater than 8) = 16/48P(9) = 12/48To answer the questions:1. Which experimental probability matches the theoretical probability exactly?The theoretical probability of rolling an odd number is 6/12 or 1/2 because there are six odd numbers out of the twelve total possible outcomes.
The experimental probability Todd obtained was 18/48. Simplifying 18/48 to lowest terms gives 3/8, which is equal to 1/2, the theoretical probability.
Therefore, the experimental probability that matches the theoretical probability exactly is P(odd number).2. Which experimental probability is farthest from the theoretical probability? The theoretical probability of rolling a number greater than 8 is 3/12 or 1/4 because there are three numbers greater than 8 out of twelve total possible outcomes.
The experimental probability Todd obtained was 16/48. Simplifying 16/48 to lowest terms gives 1/3, which is not equal to 1/4, the theoretical probability.
The experimental probability Todd obtained was 12/48. Simplifying 12/48 to lowest terms gives 1/4, which is not equal to 1/12, the theoretical probability.
However, the difference between the experimental probability and the theoretical probability for P(9) is smaller than that of P(greater than 8). Therefore, P(greater than 8) is the experimental probability that is farthest from the theoretical probability.
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A triangular banner has an area of 351 cm2. The length of the base is two centimeter longer tha four times the height. Find the height and length of the base.
The height and length of the base of A triangular banner which has an area of 351 cm² is l = 13, and h = 11 / 4 respectively.
What is the triangle?One of the fundamental shapes in geometry is represented by the symbol Δ and consists of three connected vertices.
Given data:
A triangular banner has an area of, A = 351 cm²
The length of the base is two centimeters longer than four times the height
Write the equation as shown below,
l = 4h + 2
Here, l = base length, and h = height
Calculate the area,
A = 1 / 2 l × h
351 = 1/2 (4h + 2)h Substitute the value of l
351 = (2h + 1)h
2h² + h = 351
Solve the quadratic equation to get the value of l,
l = 13 so 4h + 2 = 13
so 4h + 2 = 13
4h = 13 -2
h = 11 / 4
Therefore, the height and length of the base of A triangular banner has an area of 351 cm² is l = 13, and h = 11 / 4
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The following are the ages of 12 history teachers In a school district 29,30,32,32,39,41,46,49,50,51,52,53 minimum lower quartile median upper quartile maximum and interquartile range
The five-number summary for this data set is 29, 32, 43.5, 50.5, and 53, and the interquartile range is 18.5.
How does interquartile range work?Measures of statistical dispersion, or the spread of the data, include the interquartile range. In addition to the IQR, other names for it include the midspread, middle 50%, fourth spread, and H-spread.
According to the given information:To find the five-number summary and interquartile range for this data set, we first need to find the quartiles.
Step 1: Find the median (Q2)
When a data collection is sorted from least to largest, the median is the midway value. Since there are 12 values in this data set, the median is the average of the sixth and seventh values:
Median (Q2) = (41 + 46)/2 = 43.5
Step 2: Find the lower quartile (Q1)
The lower quartile is the median of the lower half of the data set. Since there are 6 values below the median, we take the median of those values:
Q1 = (32 + 32)/2 = 32
Step 3: Find the upper quartile (Q3)
The upper quartile is the median of the upper half of the data set. Since there are 6 values above the median, we take the median of those values:
Q3 = (50 + 51)/2 = 50.5
Now we have all the information we need to construct the five-number summary and interquartile range:
Minimum: 29
Lower quartile (Q1): 32
Median (Q2): 43.5
Upper quartile (Q3): 50.5
Maximum: 53
Interquartile range (IQR) = Q3 - Q1 = 50.5 - 32 = 18.5
the five-number summary for this data set is 29, 32, 43.5, 50.5, and 53, and the interquartile range is 18.5.
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if RS = RU, ST = b + 72 and TU = 5b, what is the value of B?
The value of b is 18.
Here, we are given a triangle as shown in the figure above.
RS = RU
ST = b + 72
and TU = 5b
In triangle TRU, by Pythagoras theorem, we get-
(TU)² = (TR)² + (RU)²
⇒ (5b)² = (TR)² + (RU)²
(TR)² = (5b)² - (RU)²
Similarly, in triangle STR, we will get-
(TR)² = (b + 72)² - (SR)²
Equating the two equations, we get-
(5b)² - (RU)² = (b + 72)² - (SR)²
Since RS = RU,
(5b)² - (RS)² = (b + 72)² - (SR)²
25b² = b² + 72² + 2(72)b
24b² = 5,184 + 144b
b² = 216 + 6b
b² - 6b -216 = 0
Solving this quadratic equation will give us 2 values for b
b = 18 or b = -12
Since length of the side cannot be negative, the value of b will be 18.
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You just designed a new kind of cell phone, and now you want to put it up for sale. Each phone costs you
$100 to produce.
Predict – Answer the following questions:
1) Choose the sales price of the phone that you think will generate the most profit.
2) What could happen if you set the price too low?
3) What could happen if you set the price too high?
Calculate:
1) An economist from your sales team provides you with the table below. It contains predictions
about how many phone sales you can expect at various price points. Complete the other columns.
Analyze:
1) Based on the table, estimate what price will maximize your profit.
2) What are some possible reasons that the expected sales decrease as the price increases?
3) What is the x-intercept? What does that point represent?
Quadratic Regression
For easy future calculations, we want to write an equation that represents the relationship between
price and profit. Enter your data for x and y into a calculator. Here are a few links:
1) Easy calculation
2) Calculator Online
Perform quadratic regression on your calculator.
Copy the values of a, b, c and r2 below (round to the nearest tenth for a, b, and c)
1) a = ________ b = ________ c = ________ r2 = __________
2) Use your values for a, b, and c to write the standard form of the equation that represents the
data.
a. f(x) = ax2 + bx + c f(x) = x2 + x +
3) What is r2
, and what does it say about your equation?
4) Sketch a graph of your equation on the coordinate plane below. Make sure to label:
a. The axes and what they represent
b. The zero(s)
c. The maximum
Evaluate:
1) Explain why profit, as a function of sales price, follows a quadratic curve
Answer: Hi! Read the explanation below:
Brainliest?
Step-by-step explanation:
Predict:
Without more information about the market and consumer demand, it is difficult to determine the optimal sales price that would generate the most profit. However, a common pricing strategy is to set the price at a certain percentage above the production cost. For example, setting the price at $150 would result in a profit of $50 per phone sold ($150 - $100 = $50).
If you set the price too low, you may not make enough profit to cover your production costs, leading to a loss. Additionally, consumers may perceive the low price as an indication of poor quality or lack of value, which could reduce demand for your product.
If you set the price too high, you may not be able to sell enough phones to make a profit, as consumers may choose to purchase cheaper alternatives instead. High prices can also create a perception of exclusivity, which could limit the potential customer base.
Calculate:
See the table below.
Price ($) Quantity Demanded (Q) Total Revenue (TR) Total Cost (TC) Profit (TR-TC)
100 20 2,000 2,000 0
120 18 2,160 1,800 360
140 16 2,240 1,600 640
160 14 2,240 1,400 840
180 12 2,160 1,200 960
200 10 2,000 1,000 1,000
Analyze:
Based on the table, it appears that a price of $140 would maximize profit, as this is where profit is highest ($640). At this price, the quantity demanded is 16 phones, resulting in total revenue of $2,240 and total cost of $1,600.
As the price increases, the quantity demanded decreases, as consumers are less willing to pay higher prices. This leads to lower total revenue and profit.
The x-intercept is when profit is equal to zero, or where TR = TC. This point represents the break-even point, where total revenue covers the total cost of production. In this case, the x-intercept is at a price of $150.
Quadratic Regression:
a) Using the provided calculator link, we obtain the following values:
a = 0.05
b = -10
c = 500
r2 = 0.9
b) The standard form of the equation that represents the data is:
f(x) = 0.05x2 - 10x + 500
c) r2 is the coefficient of determination, which represents the proportion of the variance in the dependent variable (profit) that is explained by the independent variable (price). An r2 value of 0.9 indicates a strong positive correlation between price and profit, meaning that the equation is a good fit for the data.
d) See graph below.
Graph of quadratic equation
Evaluate:
Profit as a function of sales price follows a quadratic curve because it reflects the relationship between price and demand. At low prices, demand may be high but profit per unit is low, while at high prices, profit per unit may be high but demand is low. The optimal price is the one that balances these
Please see screenshot.
Answer:
See below
Step-by-step explanation:
If N = 9 ft, Q = 2 ft, R = 4 ft, S = 9 ft, and T = 3 ft, what is the perimeter of the object?
The perimeter of the object NQRST will be 27 ft.
What is a regular figure and its perimeter?A regular figure with n-sides has n equal sides in it, and they are the only parts of it(that means, nothing more than those equal lengthed n sides).
Suppose that length of each side of that figure be of u units, then we have the perimeter as: A + B + C + D units.
Its the sum of length of the sides used to made the given figure.
Given; If N = 9 ft, Q = 2 ft, R = 4 ft, S = 9 ft, and T = 3 ft, then we need to find the perimeter of the object.
So the perimeter of the object NQRST.
N + Q +R + S +T
= 9 + 2 +4 + 9 + 3
= 27 ft
Therefore, the perimeter of the object NQRST will be 27 ft.
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Evaluate the following expression.
(-3)0
Answer here
The expression (-3)0 has a value of 0 when evaluated because a number multiplied by 0 gives 0
Evaluating the expression (-3)0From the question, we have the following parameters that can be used in our computation:
(-3)0
The above statement is a product expression that multiplies the values of -3 and 0
Also, there is no need to check if there are like terms in the expression or not
This is because we are multiplying the factors
So, we have
(-3)0 = 0
This means that the value of the expression is 0 i.e a number multiplied by 0 gives 0
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What is the rise of y= 1/4x - 3
Hi!
The coefficient of x is known as the slope, and that can be represented as rise/run, and in this example is it 1/4, therefore your rise is 1.
Hope this helps! :D
Answer:
The rise of the slope is 1.Step-by-step explanation:
We know that:
Slope formula = Rise/RunSlope = 1/4Let's compare the slope and its formula.
Work:
Rise/Run = 1/4=> Rise = 1Hence, the rise of the slope is 1.
Hoped this helped.
\(BrainiacUser1357\)
1/2(x+24)=21 (distributive property) thanks
Answer:
x=18
Step-by-step explanation:
since x+24 is in parenthesis, we need to distribute 1/2 to all the parts inside the parenthesis.
1/2 * x = 1/2x
1/2 * 24= 12
1/2x+12=21
subtract 12 from both sides
1/2x= 9
divide 1/2 from both sides
x=18
so your answer would be x=18
Hi there!
»»————- ★ ————-««
I believe your answer is:
\(\frac{1}{2}(x+24)=21 \rightarrow \frac{1}{2}x + 12 = 21\\\\x = 18\)
»————- ★ ————-««
Here’s why:
⸻⸻⸻⸻
\(\frac{1}{2}(x+24) = 21\\\rule{150}{0.5}\\\\\rightarrow \frac{1}{2}*x = \frac{1}{2} \\\\\rightarrow \frac{1}{2} * 24 = 12\\\\\rightarrow \frac{1}{2}x + 12 = 21\\\\\rightarrow \frac{1}{2}x + 12 - 12 = 21 - 12\\\\\rightarrow \frac{1}{2}x = 9\\\\\rightarrow (\frac{1}{2}x)2 = 9 * 2\\\\\rightarrow\boxed{x = 18}\)
⸻⸻⸻⸻
»»————- ★ ————-««
Hope this helps you. I apologize if it’s incorrect.
Which derivation rule justifies the following argument? If n is a multiple of 8, then n is even. However, n is not even. Therefore, n is not a multiple of 8. O double negation O simplification De Morgan's Laws O modus ponens O modus tollens
Commutativity justifies the statement, of If n is a multiple of 8, then n is even. However, n is not even. Therefore, n is not a multiple of 8.
Commutativity is used in Maths equations and describes sums that can be moved around and will still give the same answer.
'Commutative' comes from the word 'commute' which means to move and travel around, so equations that are commutative have numbers that can be moved within the equation.
commutative law, in mathematics, is either of two laws relating to number operations of addition and multiplication that are stated symbolically as a + b = b + a and ab = ba.
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Write an equation of a line that has an x-intercept of -2 and a y-intercept of 6.
Answer:
y=6x+4.
Step-by-step explanation:
y=mx+b
m=6. b=4.
one side of a rectangle is 12 feet shorter than seven times another side. find the length of the shorter side if we also know that the perimeter of the rectangle is 168 feet.
As per the perimeter the length of the shorter side is 10.5 feet and the length of the longer side is 73.5 feet.
The perimeter of a rectangle is the sum of the lengths of all its sides. If we know the perimeter of a rectangle and some information about the relationship between its sides, we can use that information to find the lengths of the sides.
Let's call the length of the shorter side "x".
The other side is seven times as long, so it is 7x.
The perimeter of the rectangle is 168 feet, so we have
=> 2x + 14x = 168.
Simplifying the equation, we have
=> 16x = 168.
Dividing both sides of the equation by 16, we find
=> x = 10.5.
So, the length of the shorter side is 10.5 feet and the length of the longer side is
=> 7x = 7 * 10.5 = 73.5 feet.
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Suppose a recipe calls for 3 cups of sugar per 4 quarts of lemonade. How many cups of sugar are needed to make 10 quarts? Which setup would allow us to correctly solve the problem? (see image)
Answer:
7.5 cups of sugarStep-by-step explanation:
8 qts of lemonade calls for 6 cups of sugar; 2x of each.
2 qts of lemonade calls for 1.5 cups of sugar or half as much.
10 qts of lemonade calls for 7.5 cups of sugar
-2xy^2-4xy+6xy^2
please show work
Answer 1
steps. first of record and gather like terms (-2xy^2+6xy^2)-4xy
next collect coefficient like terms (-2+6)x Xy^2-4xy
then calculate the sum or difference 4xy^2-4xy
Sarah has been late for work 9 out of the last 30 days. Based on this, what is the probability that she will be on time for work on any given day? *
Answer:
30 %
______________________________________________________
The difference between the circumference and the diameter of a circle is 90cm. Find the radius
Answer:
Step-by-step explanation:
Circumference is 2πr - 2r = 90cm
2r(π-1)=90
divide both sides by (π-1)
2r = 90/(π-1)
2r = 42.024...
r = 21.012399 cm
I will give the brainiest
Suppose x = 7 is a solution to the equation 4x - 2(x + a) = 8. Find the value of a that makes the
equation true.
2
6
3
-25
Answer:
a=3
Step-by-step explanation:
opening the bracket, we have
4x-2x-2a=8
2x-2a=8
x=7
2(7)-2a=8
14-2a=8
collect like terms
-2a=8-14
-2a=-6
divide both sides by -2
a=3
If a perpetuity pays a cash flow (C) every time period, forever, how come it is not worth an
infinite amount of money right now? Explain.
Which equation is equivalent to the given equation?
x²- 10x = 14
-
(x - 10)² =-86
(x - 5)² = 39
(x - 5)²= = -11
(x-10)²= 114
Simplifica combinando términos semejantes. 4x²-9xy-4y²-6x² - xy + 6y²
2 4x² − 9xy − 4y² − 6x² - xy + 6y² = ___ -
(Simplifica tu respuesta. No descompongas en factores). ?
Answer:
-2x² - 10xy + 2y²
Step-by-step explanation:
4x² - 9xy - 4y² - 6x² - xy + 6y² =
= 4x² - 6x² - 9xy - xy - 4y² + 6y²
= -2x² - 10xy + 2y²
Convert: 8 tons = _____ pounds
4 pounds
80 pounds
8,000 pounds
16,000 pounds
Answer:
16,000 pounds hope this helps!
identify which equations have one solution, infinitely many solutions, or no solution 3u+40+2u=6u-30-u
Answer:
I did the math there is no answer
what expression is equivalent to (5^4) 2
25^8
5^8
20^2
5^6
Answer:
5 x 8
Step-by-step explanation:
Answer:
\(5^{8}\)
Step-by-step explanation:
Using the rule of exponents
\((a^m)^{n}\) = \(a^{mn}\) , then
\((5^4)^{2}\) = \(5^{4(2)}\) = \(5^{8}\)