Find the solution to the following system of equations using the addition method. 5x - 3y = 12 -4x + 3y = 5 (13, -4)
Answer: You didn't give answer choices but I think the answer would be (17, 73/3)
help me i am failing math
Answer:
y = 3/-3 - 3
Step-by-step explanation:
Rise over Run is mx and b is your y intercept
Find the domain & range of the relation
{(-5,13), (6,18), (2,-7), (1,4), (-3,-1)}
Answer:
Domain: -5,6,2,1,-3
Range: 13,18,-7,4,-1
Step-by-step explanation:
Domain is the independent value/ x / input
Range is the dependent value/ y / output
find the x and y intercept and the slope of the graph of 8x-6y=24
Answer:
the x intersept is 3 the y intercept is 4
Step-by-step explanation:
x intersept : 24/8 = 3
y intersept : 24/6 =4
The graph shows the distribution of the lengths (in seconds) of videos on a popular video-streaming site. The distribution is approximately Normal, with a mean of 264 seconds and a standard deviation of 75 seconds.
A graph titled Streaming Videos has length (seconds) on the x-axis, going from negative 36 to 564. The highest point of the curve is at 264.
What percentage of videos on the streaming site are between 264 and 489 seconds?
0.15%
49.85%
95%
99.7%
According to the properties of the standard normal distribution, approximately 99.7% of the values lie within three standard deviations of the mean. Therefore, the answer is 99.7%.
To determine the percentage of videos on the streaming site that are between 264 and 489 seconds, we need to calculate the area under the normal curve within that range. Since the distribution is approximately normal with a mean of 264 seconds and a standard deviation of 75 seconds, we can use the properties of the standard normal distribution to find the desired percentage.
First, we need to convert the values 264 and 489 to z-scores, which represent the number of standard deviations a particular value is away from the mean. The z-score formula is given by:
z = (x - μ) / σ
where x is the value, μ is the mean, and σ is the standard deviation. Plugging in the values, we get:
z1 = (264 - 264) / 75 = 0
z2 = (489 - 264) / 75 = 3
Next, we can use a standard normal distribution table or a calculator to find the area under the curve between z = 0 and z = 3. The area represents the percentage of videos falling within that range. The answer is 99.7% .
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After a 4% reduction, you purchase a new suit for $288. What was the original price of the suit?
Answer:
$300
Step-by-step explanation:
Let \(x\) be the original price.
\(x \times (1-0.04)=288\)
\(0.96x=288\)
\(x=\frac{288}{0.96}\)
\(x=300\)
Answer:
$300
Step-by-step explanation:
If it was a 4% reduction then we get:
\(x*0.96=288\\\)
Divide both sides by 0.96
\(x=300\)
The original suit price was $300
Which number doesn't share the same pattern as
2,20, 4,8,300
Translate the sentence into an equation. The quotient of a number and 8 is 16. What is the solution to the equation? One-half 2 128 164
Answer:
128
Step-by-step explanation:
I did the math
Answer:
it's 2 :)
Step-by-step explanation:
quotient is a term used in division so you divide
16 divided by 8 is 2 <3
don't forget to say thanks if you got it right ! :)
Determine if it is Exponential growth or decay. Use the information below to plug in the numbers to the formula. f(x)=a(1+or-r)^x
The value of x for each value of f(x) will lie between two consecutive whole numbers. List the whole numbers.
initial value: 1,200
decay rate: 12.5%
f(x) = 450
The exponential function is a decay, and it can be written as:
f(x) = 1,200*( 0.875)^x
Is it an exponential growth or decay?The general exponential function can be written as:
f(x) = A*(b)^x
Where A is the initial value and b is the base.
Here we have a decay rate, so this is an exponential decay, and we can write:
b = 1 - r
Where r is the decay rate in decimal form:
b = 1 - 0.125 = 0.875
And the initial value is 1,200, so the exponential function is:
f(x) = 1,200*( 0.875)^x
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I will give you the brainliest!!! And 25 points!!!!
Someone solve this for me with explanation please. I need help
The perimeter of the given triangle with given lengths is; 78
What is the perimeter of the triangle?The perimeter of a triangle is defined as the sum total of the 3 side lengths of the triangle.
Now, we are given the triangle as QRS.
We are given that;
A is the midpoint of QR
B is the midpoint of RS
C is the midpoint of SQ
Thus;
QA = RA = 10
BR = SB = 15
SQ = 28
Thus;
Perimeter of Triangle = 2(10) + 2(15) + 28 = 78
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If a toaster produces 12ohms of resistance in a 120-volt circuit. What is the amount of current in the circuit
Answer:
10 amps.
Step-by-step explanation:
According to Ohm's Law, V=IR, and, dividing both sides by R, we have \(V/R=I\), where V is the amount of volts, R is the amount of resistance, and I is the current in amps.
Plugging the values into the formula, we have \(120/12 = 10\).
Therefore, there is 10 amps of current in the circuit.
What is the value of f(−3)? f(−3) = What are the domain and range of f(x)? (Negative infinity, infinity) ; (Negative infinity, 4); (Negative infinity, 4 Right-bracket (Negative infinity, 4 Right-bracket On a coordinate plane, a piecewise function is comprised of 2 lines and a curve. A line starts at closed circle (negative 3, 4) and has a negative slope toward (negative 5, 1). A line starts at open circle (negative 3, 3) and goes to closed circle (0, 0). A curve starts at closed circle (0, 0) and curves up to open circle (4, 2). f (x) = StartLayout Enlarged left-brace First row x + 7, x less-than-or-equal-to negative 3 Second row negative x, negative 3 less-than x less-than-or-equal-to 0 third row StartRoot x EndRoot, 0 less-than x less-than 4 EndLayout
Answer:
4
B
Step-by-step explanation:
Answer:
4
next one is B
Step-by-step explanation: EdGE
999999999999999999999999x696969
Answer:
=6.96969e+29
Step-by-step explanation:
exper Con
The dot plot below represents the number of goals scored by the girls' soccer team in
every game so far this season.
goals
●●●●T
GOALS SCORED
Goals
What was the median number of goals scored?
The median number of goals is 1.5.
What is the median?A dot plot is a graph that is made up of a number line and dots. The dots in the dot plot represent the frequency of the data. For example, the frequency of 1 is 4. This means that 4 people scored 1 goal.
Median is the number that is at the center of a data that has been arranged either in ascending or descending order. median is a measure of central tendency. Other measures of central tendency include mean and mode.
Data in ascending order: 1, 1, 1, 1, 2, 3, 3, 4
Median = (2 + 1) / 2 = 1.5
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All the employees of ABC Company are assigned ID numbers. The ID number consists of the first letter of an employee's last name, followed by three numbers. (a) How many possible different ID numbers are there
Answer:
there will be 9 id no. which it contains
Please help thank uuuuu
Answer:
12
Step-by-step explanation:
You simply add the coefficients together.
3 + 4 + 5 = 12
please help 3/4 divided by 1/8
Answer:
6
Step-by-step explanation:
please help 3/4 divided by 1/8
3/4 : 1/8 =
3/4 x 8 =
24/4 =
6
Determine the value of n that makes the polynomial a perfect square trinomial. Then factor as the square of a binomial. Express numbers as integers or simplified fractions
The value of n in the expression is 16
How to determine the value of nFrom the question, we have the following parameters that can be used in our computation:
y^2 + 8y + n
Take the coefficient of y
So, we have
k = 8
Divide by 2
k/2 = 4
Square both sides
(k/2)^2 = 16
This means that
n = 16
Hence, the value of n is 16
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Help pls pls help pls pls help
It's 8, it gave Y so pretty easy from there on
y = 4
y = 1/4 x + 2
______________
4 = 1/4 x + 2
4 - 2 = 1/4 x + 2 - 2
2 = 1/4 x
2 × 4 = 4 × ( 1/4 ) × x
x = 8
Thus the correctly answer is option D.
find the radius and diameter of a circle with a circumference of 51π
Answer:
Radius = 25.5 units
Diameter = 51 units
Step-by-step explanation:
r = radius of circle
d = Diameter of circle
= \(2r\)
Circumference of circle = \(2\pi r\)
Substitute the provided value of the circumference:
\(51\pi = 2\pi r\)
r is to be isolated and made the subject of the formula:
\(r = \frac{51\pi}{2\pi}\)
\(\pi\) in the numerator and denominator cancel each other outcompletely:
\(r = \frac{51}{2}\)
∴r = radius of circle = 25.5 units
This also means that:
\(d = 2r\)
\(d = 2(25.5)\)
∴d = Diameter of the circle = 51 units
-70+45+x=100
I need this right away!
Answer:
x=125
Step-by-step explanation:
A farmer builds a fence for his chickens in the shape
of a pentagon, as shown. Each of the 5 sides has equal
length, but the fence along the highway costs twice as
much as any one of the other 4 sides. If the total cost
of fencing was $1800, how much did the highway
fence cost?
Answer:
The highway fence cost $600.
Step-by-step explanation:
Since the highway fence is twice as cost as the one of the other 4 sides, this means that the highway fence = 2 normal fence.
Therefore, we use
$1800 / highway fence(2 normal fence) + 4 normal fence
$1800 / (2 + 4) = $300
This means that every normal fence cost $300.
Which then we get the highway fence is $600 because it costs double of the normal fence.
According to the histogram below, how many people took the test? 39 9 16 23
The correct answer is D. 23
Explanation:
Histograms similar to other graphs represent numerical information, usually by using bars, as well as ranges. For example, in the case presented the information presented belongs to the scores obtained in a test, which are shown using ranges. Moreover, it is possible to know the total of people that took the test by adding each of the frequencies, as the frequency in the y-axis shows the number of times the range repeated and it is expected each grade registered belongs to 1 person. This means the total of people is equal to 2 (score from 60-69) + 9 (score from 70-79) + 7 (score from 80-89) + 5 (score from 90-99) = 23 people.
Answer:
the answer is 23
Step-by-step explanation:
hopes this helps:)
It is assumed that the test results for a class follow a normal distribution with a mean of 78 and a standard deviation of 36. If you know that a student's grade is greater than 72, what is the probability that it is greater than 84
Answer: 0.4337
Step-by-step explanation:
Let X represents the test results for a class that follow a normal distribution .
Given: Mean \(\mu=78\), Standard deviation \(\sigma=36\)
Then, the probability that it is greater than 84 will be
\(P(X>84)=P(\dfrac{X-\mu}{\sigma}>\dfrac{84-78}{36})\\\\=P(Z>0.167)\ \ \ [Z=\dfrac{X-\mu}{\sigma}]\\\\=1-P(Z<0.167)\\\\=1-0.5663=0.4337\ [\text{By p-value table}]\)
Hence, the required probability = 0.4337
PLEASE HELP ASAP! Determine whether each graph represents a direct variation relationship
Answer:
1. Yes, it does not have a y-intercept, but has slope.
2. No, it has y-intercept.
Step-by-step explanation:
A direct variation relationship has to be able to fill in the equation y=mx. Any direct variation relationship cannot have a y-intercept in it. Therefore, question 1 is a direct variation relationship and question 2 is not a direct variation relationship.
While changing oil in your motorcycle you notice that you need 2 quarts and 6 ounces of oil, but you're using a metric graduated cylinder to measure the oil. How many milliliters of oil do you need?
We need 2070.147 milliliters of oil in motorcycle if we're using a metric graduated cylinder to measure the oil.
What is Conversion of units ?
The same feature is expressed in a different unit of measurement through a unit conversion. Time can be stated in minutes rather than hours, and distance can be expressed in kilometer rather than miles, or in feet rather than any other unit of length.
We've 2 quarts and 6 ounces of oil.
1 quart = 946.353 ml
1 ounce = 29.5735 ml
So, 2 quarts and 6 ounces = (2 × 946.353) ml + (6× 29.5735) ml
= 1892.706 ml + 177.441 ml
= 2070.147 ml.
Hence, We need 2070.147 ml of oil.
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Two owners of a cattle ranch, Robert and Val, want to find the average weight for the ranch's 200 Cows. Instead of weighing all of the cows: Robert weighs 25 cows and gets an average weight of 1,550 pounds (stdev = 50) • Val weighs 100 cows and gets an average weight of 1,380 pounds (stdev = 50) What is Val's margin of error, rounded to the nearest whole number? (The formula is 1.96 (std dey)//N
The required margin of error for Val is 9.8 pounds.
What do we mean by Margin of error?The margin of error is a statistic that describes how much random sampling error there is in survey results.
One should have less faith that a poll's findings would accurately reflect those of a population census the higher the margin of error.
Multiplying a key factor (for a specific confidence level) and the population standard deviation yields the calculation for the margin of error.
The square root of the sample's observational count is then used to divide the outcome.
So, the following equation provides the margin of error:
M = 1.96 s/√n
Now, calculate as follows:
M = 1.96 s/√n
M = 1.96 50/√100
M = 9.8
Therefore, the required margin of error for Val is 9.8 pounds.
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Correct question:
Two owners of a cattle ranch, Robert and Val, want to find the average weight for the ranch’s 200 cows. Instead of weighing all of the cows: Robert weighs 25 cows and gets an average weight of 1,550 pounds (stdev = 50) Val weighs 100 cows and gets an average weight of 1,380 pounds (stdev = 50) What is Val’s margin of error, rounded to the nearest whole number? (The formula is 1.96 (std dev) / square root of N
solve the system of equation for y using cramer's rule. hint: the determinant of the coefficient matrix is 4.
Cramer's rule states that the solution to a system of equations can be determined by taking the determinant of the coefficient matrix, which in this case is 4, and then dividing each equation's determinant of the corresponding matrix by the determinant of the coefficient matrix. This allows us to solve for the variable y.
Cramer's Rule is a method used to solve systems of linear equations. It states that the solution to a system of equations can be determined by taking the determinant of the coefficient matrix and then dividing each equation's determinant of the corresponding matrix by the determinant of the coefficient matrix. This gives us the solution for the variable y. To calculate the determinant of the coefficient matrix, we take the product of the diagonal elements and subtract the product of the elements that are not on the diagonal The determinant is calculated by taking the product of a and d, and then subtracting the product of b and c. Once we have the determinant of the coefficient matrix, we can calculate the determinants of each equation's corresponding matrix by replacing the y in the equation with 1 and the other coefficients with the original coefficients of the equation. We then divide each equation's determinant by the determinant of the coefficient matrix to solve for y. This method is useful as it allows us to solve a system of equations with multiple variables in a quick and efficient manner.
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Find the volume of this cone. Use 3 for TT. V = Tr2h 3 8ft V V ~ [?]ft 3 6ft Enter
Let's begin by listing out the information given to us:
Height (h) = 8 ft
Diameter (d) = 6 ft
The volume of a cone is given by the formula:
\(\begin{gathered} V=\frac{1}{3}\pi r^2h \\ \pi=3,r=\frac{d}{2}=\frac{6}{2}=3ft,h=8ft \\ V=\frac{1}{3}\cdot3\cdot3^2\cdot8=9\cdot8=72 \\ V=72ft^3 \end{gathered}\)Diameter = 6 ft
In the number 725.78, how does the value of the 7 in the tenths place compare to the value of the 7 in the hundreds place?
Answer:
C. 1/1,000
Step-by-step explanation:
yes or no ?