URGENT!!! Will give brainliest if correct :))
Miss Rose teaches three ballet classes. Her students' data are shown in the relative frequency table.
Boys
Girls
Total
Beginner
0.15
0.1
0.25
Intermediate
0.2
0.35
0.55
Advanced
0.05
0.15
0.2
Total
0.4
0.6
1.0
Which statement is true?
A. 15% of her students are girls.
B. 60% of her students are boys.
C.20% of her students are in the intermediate class.
D. 25% of her students are in the beginner class.
Answers
Answer: D. 25% of her students are in the beginner class.
Step-by-step explanation:
Looking at the table, we can see that the relative frequency for the beginner class is 0.25, which corresponds to 25% of the total number of students. Therefore, statement D is true.
Statement A is false, as the relative frequency of girls is 0.6, which corresponds to 60% of the total number of students.
Statement B is also false, as the relative frequency of boys is 0.4, which corresponds to 40% of the total number of students.
Statement C is false, as the relative frequency for the intermediate class is 0.55, which corresponds to 55% of the total number of students.
Related Questions
which equation or inequality shows the relationship between the plotted points on the number line
A. 3 < -6
B.-6 > -3.
C.-6 < -3
D.-3 < -6
Answers
Answer:
letter c.po sagot diyan
A bag of candy contains 300 pieces of which 28% are red. How many pieces are not red? *
Answers
Answer:
The answer is: 84
Step-by-step explanation:
Trust me
good luck
.1428 rounded to the nearest thousandth
Answers
8 is bigger then 5 so round up
Rounding a number means changing its value to a number that is closer to a certain level of precision or a certain place value. When we round a number, we usually specify the level of precision or place value that we want the rounded number to have. For example, we might want to round a number to the nearest whole number, to the nearest tenth, or the nearest thousandth.
The process of rounding involves looking at the digit in the place value that we want to round to and using the digit to the right of it to determine whether to round up or down.
Rules of Rounding:
If the digit to the right of the place we are rounding to is 5 or greater, we round up. If the digit to the right of the place we are rounding to is less than 5, we round down.The place values to the right of the decimal point, or the right of one's place in number, are called decimal places. The decimal places are numbered starting from the tenth place, which is one place to the right of the decimal point. The next place to the right is the hundredth place, followed by the thousandth place, and so on.
The third place to the right of zero is the thousandth place. When rounding to the nearest thousandth we have to look at the fourth decimal place to see whether it must be rounded up or down. The fourth digit is an 8 which is greater than 5. So we must round the thousandth place up.
This gives us 0.143, rounded to the nearest thousandth.
7. Ryan has $3.00 worth of coins in his coin jar. If the jar contains 16 coins and all of the coins in the jar
are either nickels or quarters. How many quarters does he have?
Answers
Answer:
pretty sure he has 5 quarters
Step-by-step explanation:
16 divided by 3 = 5
Feliciano is using a pretest/posttest design to conduct an experiment on improving children’s handwriting, employing two different techniques of improving handwriting and a control condition. In the results, the two groups who receive the treatment don’t show any difference from each other. Feliciano believes that there is a difference but that his 3-point assessment scale of handwriting cannot detect it. Identify the true and false statements about Feliciano’s study. True Statement(s) Drag appropriate answer(s) here Feliciano is most concerned about using an insensitive measure. Press Space to open To address his concern, Feliciano should use a scale with more levels for his dependent variable. Press Space to open To address his concern, Feliciano should use a manipulation check for his independent variable. Press Space to open To address his concern, Feliciano should increase his sample size. Press Space to open Feliciano is most concerned about measurement error.
Answers
The test result can be made more responsive by adjusting the parameters
of the test.
Feliciano should use a scale with more levels for his dependent variableFeliciano should use a manipulation check for his independent variable Feliciano should increase the sample size.Reasons:
The type of experiment being performed by Feliciano is children
handwriting improvement based on two techniques and a control condition.
The number of groups that receive the treatment = Two
The assessment method used = 3-point assessment scale
The true statements are;
Feliciano should use a scale with more levels for his dependent variableIncreasing the number of levels on the scale, increases the variability of the response such that more responses can be obtained from the participants than when using a 3-point scale, based on the closeness between the the variables being assed.
Feliciano should use a manipulation check for his independent variableA manipulation check can be used to determine the effectiveness of the treatment applied , such as the inclusion of question that finds out about the participants association to the treatment.
Feliciano should increase the sample sizeIncreasing the sample size increases the z-value, and makes it more likely to reject the null hypothesis, that there is no difference between the two groups.
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John is 5 feet 9 inches tall, which is 4.6 inches taller than Kara. How tall is Kara?
Answers
Answer:
5 feet 4.4 inches tall
Step-by-step explanation:
Answer question with steps asap I’ll give brainliest! Use photo above
Answers
This is a table of values of three functions at selected values of x.
It is asking for h(f(-2))
Its saying, take f(-2), and take whatever you get from that and put it into h(x)
So, find f(-2).
Find x = -2, then see what f is there.
f(-2) = -1
So, find h(-1)
h(-1) = 0
Hope this helps :)
If you need any more explanation, feel free to ask. If this really helps, consider marking brainliest.
- Jeron
If the two angles are complementary, find the measure of each angle.
Answers
Answer:
∠CTM = 60
∠MTY = 30
Step-by-step explanation:
Complementary means adds to 90°
2p + p = 90
3p = 90
p=30
2p = 60
Answer: angle CTM-60 and angle MTY=30
Step-by-step explanation:
If two angles are complementary that means added together they are 90.
We can make this equation to solve for p: 2p+p=90
Now we can solve
\(2p+p=90\\3p=90\\\frac{3p}{3} =\frac{90}{3}\\p=30\)
now that we know p is 30 we can sub it in to find the measure of CTM
2(30)
60
20. Kim works on commission. If her monthly earnings for the first
four months of the year were $1625, $960, $1235, and $1420,
estimate what her annual earnings will be.
A) $14,240 B) $15,390 C) $15,720 D) $16,150 E) $16,280
O A
OB
OC
OD
ΟΕ
Answers
Since, Kim works on commission and her trend of monthly earnings are not constant, Calculate the average from the data and estimate for the whole year , The answer is C) $15,720
What is statistics?Statistics is the branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of data. It helps to make sense of large amount of data and use it to draw conclusions and make informed decisions. It provides methods to summarize, describe and analyze data, as well as techniques to infer characteristics of a population from a sample.
What is mean of the data?The mean is a measure of central tendency and a way to describe the average value of a dataset. It is calculated by adding up all the values in a dataset and then dividing by the number of values. The resulting value is the mean of the dataset, also known as the arithmetic average. Mean is commonly used to describe a large data set, while median is used to describe data with values have outliers.
salary for four months = $1625, $960, $1235, and $1420.
Average = ($1625 + $960+ $1235+$1420) /4 = $1310
for whole year = $1310 * 12 = $15,720
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⁻AD and ⁻CG are diameters of ®B . Identify each arc as a major arc, minor arc, or semicircle. Then find its measure.
mCGD
Answers
The semicircles are arc AD and arc CG
The measure of the arc GCD is 180°
Identifying the segments of the circlefrom the question, we have the following parameters that can be used in our computation:
Diameters = AD and CG
This means that
There are no major arc or minor arcs
While the semicircles are arc AD and arc CG
Since, AD is a diameter.
Then, ACD is a semicircle
The measure of a semicircle is 180.
So, the measure of arc GCD is 180°.
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which of the following basic functions is equivalent to the piecewise-defined function f(x)= x if x≥0 −x if x<0 ? question content area bottom part 1 a. f(x)= 1 x b. f(x)=x c. f(x)=x2 d.
Answers
The basic function equivalent to the piecewise-defined function f(x) = x if x ≥ 0 and -x if x < 0 is f(x) = |x|, which represents the absolute value of x.
The given piecewise-defined function f(x) has different expressions for different intervals. For x greater than or equal to zero, f(x) takes the value of x. For x less than zero, f(x) is equal to -x. We need to find a basic function that captures this behavior.
Among the options provided, f(x) = |x| is equivalent to the given piecewise function. The absolute value function, denoted by |x|, returns the positive value of x regardless of its sign. When x is non-negative, |x| equals x, and when x is negative, |x| is equal to -x, mirroring the conditions of the piecewise-defined function.
The function f(x) = |x| represents the absolute value of x and matches the behavior of the given piecewise-defined function, making it the equivalent basic function.
In summary, the basic function equivalent to the piecewise-defined function f(x) = x if x ≥ 0 and -x if x < 0 is f(x) = |x|, which represents the absolute value of x.
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At 8 a.m., the temperature in Phoenix, Arizona, is 74°F. The Temperature increases 25% by 11 a.m. and another 20% by 2 p.m. What is the temperature at 2 p.m.? Round your answer to the nearest tenth of a degree Fahrenheit.
(I ALREADY KNOW THE ANSWER. BUT I NEED THE WORK FOR THE ANSWER TO SHOW MY TEACHER) (the answer is 111.0 °F)
Answers
The final temperature is original temp + original temp * temp increase
74+74*0.25=92.5
(another increase)
92.5+92.5*0.2=111
Final: 111degrees
She must determine height of the clock tower using a 1.5 m transit instrument (calculations are done 1.5 m above level ground) from a distance 100 m from the tower she found the angle of elevation to be 19 degrees. How high is the clock tower from 1 decimal place?
Answers
Step-by-step explanation:
We can use trigonometry to solve this problem. Let's draw a diagram:
```
A - observer (1.5 m above ground)
B - base of the clock tower
C - top of the clock tower
D - intersection of AB and the horizontal ground
E - point on the ground directly below C
C
|
|
|
|
| x
|
|
|
-------------
|
|
|
|
|
|
|
|
|
B
|
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|
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|
A
```
We want to find the height of the clock tower, which is CE. We have the angle of elevation ACD, which is 19 degrees, and the distance AB, which is 100 m. We can use tangent to find CE:
tan(ACD) = CE / AB
tan(19) = CE / 100
CE = 100 * tan(19)
CE ≈ 34.5 m (rounded to 1 decimal place)
Therefore, the height of the clock tower is approximately 34.5 m.
Find the values of x and y in parallelogram PQRS. PTy, TR 4x1, QT 2y, TS 5x+8
Answers
Answer:
Step-by-step explanation:
For a consumer with demand function q=100−5p 1/2
, find: a) consumer surplus(CS), at price p 0
=9 b) CS, at price p
^
=4 c) ΔCS, resulting from the price change p 0
=9 to p
^
=4 Illustrate your results on a single graph.
Answers
a)An consumer demand function surplus(CS), at price p 0CS = [8500 - (10/3)(85)²(3/2)]
b) CS, at price p CS = [9000 - (10/3)(90)²(3/2)]
c)ΔCS, resulting from the price change p₀ = 9 and P= 4.
To calculate consumer surplus (CS) using the demand function q = 100 - 5p²(1/2), to find the inverse demand function. The inverse demand function expresses price as a function of quantity.
Let's solve for the inverse demand function:
q = 100 - 5p²(1/2)
Rearranging the equation,
p²(1/2) = (100 - q) / 5
Squaring both sides of the equation:
p = [(100 - q) / 5]²
a) To calculate consumer surplus at price p₀ = 9:
substitute p = 9 into the inverse demand function:
q = 100 - 5(9)²(1/2)
q = 100 - 5(3)
q = 100 - 15
q = 85
Now, let's calculate the CS:
CS = ∫[0, q](100 - 5p^(1/2)) dp
CS = ∫[0, 85](100 - 5p^(1/2)) dp
To find the integral, first integrate the function 100 with respect to p and then integrate -5p²(1/2) with respect to p:
CS = [100p - (10/3)p²(3/2)]|[0, 85]
Substituting the limits of integration:
CS = [100(85) - (10/3)(85)²(3/2)] - [100(0) - (10/3)(0)²(3/2)]
Simplifying:
b) To calculate consumer surplus at price P = 4:
We substitute p = 4 into the inverse demand function:
q = 100 - 5(4)²(1/2)
q = 100 - 5(2)
q = 100 - 10
q = 90
Now, let's calculate the CS:
CS = ∫[0, q](100 - 5p²(1/2)) dp
CS = ∫[0, 90](100 - 5p²(1/2)) dp
Using the same process as before,
CS = [100p - (10/3)p²(3/2)]|[0, 90]
Substituting the limits of integration:
CS = [100(90) - (10/3)(90)²(3/2)] - [100(0) - (10/3)(0)²(3/2)]
Simplifying:
c) To find ΔCS resulting from the price change from p₀ = 9 to P = 4:
ΔCS = CS(P) - CS(p₀)
Substituting the calculated CS values,
ΔCS = [9000 - (10/3)(90)^(3/2)] - [8500 - (10/3)(85)²(3/2)]
The x-axis represents quantity (q), and the y-axis represents price (p). the demand curve and shade the areas representing consumer surplus at p₀ = 9 and P = 4.
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Eduardo is painting a rectangular wall that is 96inches high and 120 inches long. What is the area of the wall?
Answers
Answer: 11520 sq in. or 80 square feet
Step-by-step explanation: To find the area is length times width or 96 in times 120 in which is (96 times 120)(in)(in)=11520in^2. And since 12 in = 1 foot squaring both sides 144in ^2=1 foot ^2 so 11520 divided by 144 is 80.
Cynthia rounds a number, x, to one decimal point.
The result is 6.3
Write down the error interval for x.
Answers
Answer:
[6.26,6.29]U[6.31,6.34
Step-by-step explanation:
6.26
6.27
6.28
6.29
6.31
6.32
6.33
6.34
So in interval form [6.26,6.29]U[6.31,6.34]
The sum of two numbers is 892. One of the numbers is 363. What is the other number?
Answers
Answer:
I wish I've known, but try using Symbo-Lab or Math-Way. They help a lot.
Step-by-step explanation:
Answer:
229
Step-by-step explanation:
363 -892=229
229+363=892
plzz answer this question i will mark brainliest
Answers
Answer:
Step-by-step explanation:
line 1.
y=3
line 2.
x=-1.2
line 3.
x=3
line 4.
y=-2.6
length=3-(-1.2)=3+1.2=4.2
width=3-(-3)=3+3=6
area=4.2×6=25.2
Select all the pairs of numbers that have the same greatest common factor.
Answers
Pairs of numbers that have the same greatest common factor are: (12, 18) and (12, 30) and (18, 30) with a greatest common factor of 6.
Define the term greatest common factor?The largest positive integer that divides two or more numbers without producing a remainder is known as the greatest common factor (GCF).
To find the greatest common factor (GCF) of two numbers, we need to find the largest number that divides both of them.
Let's start by listing the factors of each number:
12: 1, 2, 3, 4, 6, 12
18: 1, 2, 3, 6, 9, 18
20: 1, 2, 4, 5, 10, 20
30: 1, 2, 3, 5, 6, 10, 15, 30
Now we can compare the pairs of numbers and see which ones have the same GCF:
GCF(12, 18) = 6
GCF(12, 20) = 4
GCF(12, 30) = 6
GCF(18, 20) = 2
GCF(18, 30) = 6
GCF(20, 30) = 10
So the pairs that have the same GCF are:
12 and 18, with a GCF of 6
12 and 30, with a GCF of 6
18 and 30, with a GCF of 6
Therefore, Pairs of numbers that have the same greatest common factor are: (12, 18) and (12, 30) and (18, 30) with a GCF of 6.
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(5) Model the problem below using a number line. Record the equation and
model on your paper.
The temperature of a liquid in an experiment is 0°C at 8:00am. The experiment
call for the temperature to change
-3°C every hour. What will the temperature be at noon?
Answers
The temperature of liquid in an experiment at 12 noon is -12° C and the equation is -3x + y
Given,
The temperature of a liquid in an experiment at 8.00 am = 0° C
The change in temperature every hour = -3° C
We have to find the temperature at noon.
Here,
Temperature at 8 am = 0° C
Temperature at 9 am = 0 + -3 = -3 ° C
Temperature at 10 am = -3 + -3 = -6° C
Temperature at 11 am = -6 + -3 = -9° C
Temperature at 12 noon = -9 + -3 = -12° C
That is,
The temperature of liquid in an experiment at 12 noon is -12° C
Now,
Equation;
Let x be the time and y be the previous hour's temperature.
Then,
-3x + y
Therefore,
The temperature of liquid in an experiment at 12 noon is -12° C and the equation is -3x + y
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Research shows that identical twins generally differ by less than 6 pounds in body weight. If Kim
weighs 127 pounds, then in what range is the weight of her identical twin sister Kathy?
Answers
The range is the weight of her identical twin sister Kathy is 119 < x < 137 i.e [ 119, 137 ].
What is Inequality?In mathematics, inequality is a relationship between two expression or values which are not equal to each other. The symbols include in inequality are "<" , "≤" , ">" , "≥" , "≠".
We have, Research shows that difference in weight of identical twins.
Weight of Kim = 127 pounds
The difference in weight of twins is less than 6 pounds . Let the weight of Kim's sister Kathy be "x pounds". Now, the inequality of difference in their weights,
either x - 127 < 6 or 127 - x < 6
=> either x < 6+ 127 or -x < 6 - 127
=> either x< 133 or -x < - 119
=> either x < 137 or x > 119
So, range of weight of her sister Kathy is 119 < x < 137.
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Use the figure to answer the question.
10 in.
3 in.
What is the area of the shaded portion to the nearest hundredth? Enter the answer in the box.
Answers
You have to find the area of a rectangle, then find the the area of a circle then divide the area of the circle by 2, then subtract the area of the rectangle by whatever you got from dividing the are of the circle.
f(x)=3x-1 Find f(-8)
Answers
Answer: y=-25
Step-by-step explanation:
Plug in -8 for x
3(-8)-1
-24-1
-25
Answer:
x= -25
Step-by-step explanation:
-8(3)-1=
-24-1=
-25
Item 20 Question 1 Identify an algebraic equation you can use to find the measure of each angle based on the given description. Then find the measure of each angle. The measure of one angle is 3° more than 12 the measure of its supplement. x+(12x+3)=180 x+(12x+3)=90 x+(12x−3)=180 x+(12x−3)=90 Question 2 The measure of the smaller angle is º. The measure of the larger angle is º. Item 20 Question 1 Identify an algebraic equation you can use to find the measure of each angle based on the given description. Then find the measure of each angle. The measure of one angle is 3° more than 12 the measure of its supplement. x+(12x+3)=180 x+(12x+3)=90 x+(12x−3)=180 x+(12x−3)=90 Question 2 The measure of the smaller angle is º. The measure of the larger angle is º.
Answers
this is not the write answer im just it bec whevener but i think it is 13=845-684x3 i think it is the answer
Step-by-step explanation:
Aaron is baking cookies. The recipe uses 2 cups of flour to make 30 cookies. If Aaron wants to make 40 cookies, how many cups of flour should he use
plz answer asap.
Answers
Step-by-step explanation:
30 cookies = 2 cups
1 cookie = 2/30 cups = 1/15 cups
40 cookies = 1/15 × 40 = 8/3 cups
The cook prepares 12 hard-boiled eggs, 36 scrambled
eggs, and 7 poached eggs. Write the ratio of hard-
boiled to scrambled eggs as a fraction.
Answers
Answer: 12/36 and simplified would be 1/3
Step-by-step explanation:
12 - hard boiled eggs
——
36 - scrambled
Divide them by 12 and you get a simplified fraction
I NEED HELP!!! What is is this ----> 3x - 3y = 3 12x + 8y = -8
x = what
y = what
Answers
Answer:
3x = 3 + 2y -------------> 3x - 2y = 3 {subtracted 2y from each side of top equation}
(-4/3)x + y = -2/3 ------> -4x + 3y = -2 {multiplied bottom equation by 3}
3x - 2y = 3 ------> 12x - 8y = 12 {multiplied top equation by 4}
-4x + 3y = -2-----> -12x + 9y = -6 {multiplied bottom equation by 3}
12x - 8y = 12
-12x + 9y = -6
--------------
y = 6 {added the two equations}
3x = 3 + 2y {original top equation}
3x = 3 + 2(6) {substituted 6, in for y, into top equation}
3x = 3 + 12 {multiplied}
3x = 15 {added}
x = 5 {divided each side by 3}
x = 5 and y = 6
Step-by-step explanation:
Answer:
x= 0
y= -1
Step-by-step explanation:
Hope this helps.
Consider the function represented in this table. f(x) -1 -21 0 -9 1 3 2 15 Which of these tables could represent the inverse of function f? X X -1 0 1 2 q(x) 21 9 -3 -15
Answers
If f(-1)=-21,f(0)=-9,f(1)=3,f(2)=15 then the inverse of function f(x) is p(-21)=-1,p(-9)=0,p(3)=1,p(15)=2 which is option d.
Given that f(-1)=-21,f(0)=-9,f(1)=3,f(2)=15 and we are required to find the inverse if the function.
Function is relationship between two or more variables expressed in equal to form. In a function each value of x must have corresponding value of y.
The given function is as under:
f(-1)=-21,
f(0)=-9,
f(1)=3
f(2)=15
In the inverse of the function the value of x becomes the value of y and the value of y becomes the value of x. So the inverse of the function is as under:
p(-21)=-1,
p(-9)=0,
p(3)=1,
p(15)=2
Hence if f(-1)=-21,f(0)=-9,f(1)=3,f(2)=15 then the inverse of function f(x) is p(-21)=-1,p(-9)=0,p(3)=1,p(15)=2 which is option d.
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4. If S is in the interior of ZPQR , then mZPQS + m_SQR = m_PQR.
a. Protractor Postulate
b. collinear
c. angle bisector
d. angle
e. Angle Addition Postulate