If the boys in the classroom are 40% of the class, how many students are there in the class?
A. 24
B. 32
C. 40
D. 48
E. 56
Answers
Answer:
b
Step-by-step explanation:
Related Questions
A circle of center (-3 , -2) passes through the points (0 , -6) and (a , 0). Find a?
Answers
Answer:
-4.5
Step-by-step explanation:
Answer:
\( a=1.58, \: \: a =-7.58\)
Step-by-step explanation:
Since, circle of center (-3 , -2) is passing through the points (0 , -6) and (a , 0).
Therefore, points (0 , -6) and (a , 0) will be equidistant from the center of the circle (-3 , -2).
Hence,
Distance between (0 , -6) and (-3 , -2) = Distance between (a , 0) and (-3 , -2).
\( [0-(-3)]^2 + [-6-(-2)]^2=[a-(-3)]^2 + [0-(-2)]^2\)
\( [0+3]^2 + [-6+2]^2=[a+3]^2 + [0+2]^2\)
\( [3]^2 + [-4]^2=[a+3]^2 + [2]^2\)
\( 9 + 16=[a+3]^2 + 4\)
\( 25=[a+3]^2 + 4\)
\( 25-4=[a+3]^2\)
\( 21=[a+3]^2\)
\( [a+3]^2=21\)
\( [a+3]=\pm\sqrt {21} \)
\( a=\pm\sqrt {21} - 3\)
\( a=\sqrt {21} - 3, \: \: a =-\sqrt {21} - 3\)
\( a=1.58257569, \: \: a =-7.58257569\)
\( a=1.58, \: \: a =-7.58\)
this is hard i need help!!!!!
Answers
The graph contains a system of equations. What two equations are represented in this system? Select all that apply.
Answers
Answer:
A D
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
If \((x-\frac{1}{x} ) = 9\) and \((x^2-\frac{1}{x^2} ) = 53\), then find the value of \((x-\frac{1}{x} )\).
Please answer asap!
Answers
Answer:
9
Step-by-step explanation:
It says it in the question (x - 1/x) = 9
The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.
Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside
Part A: Calculate the measures of center. Show all work. (2 points)
Part B: Calculate the measures of variability. Show all work. (1 point)
Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)
Answers
For Mountain View School:
Data: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 0 + 1 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 8 + 8 + 8 + 9) / 19
= 100 / 19
≈ 5.26
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
For Seaside School:
Data: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 1 + 1 + 2 + 2 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 7 + 8 + 8 + 8 + 9) / 19
= 80 / 19
≈ 4.21
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
Now let's calculate the measures of variability, specifically the range and interquartile range (IQR).
Range: The range is the difference between the largest and smallest values in the dataset.
For Mountain View School:
Range: 9 - 0 = 9
For Seaside School:
Range: 9 - 0 = 9
Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) and measures the spread of the middle 50% of the data.
For Mountain View School:
Q1 = 3
Q3 = 7
IQR = Q3 - Q1 = 7 - 3 = 4
For Seaside School:
Q1 = 2
Q3 = 7
IQR = Q3 - Q1 = 7 - 2 = 5
To determine which school is a better choice for a smaller class size, we can consider both the mean and the median.
Both the mean and median for Mountain View School are higher than those for Seaside School. This suggests that, on average, the class sizes at Mountain View School are larger than those at Seaside School. Therefore, if you are interested in a smaller class size, Seaside School would be a better choice
For Mountain View School:
- Median: The median class size is the middle value, which is 25.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (29 + 28 + 28 + 27 + 25 + 24 + 24 + 23 + 21 + 20 + 19 + 18 + 15 + 13 + 10) / 15 = 21.27.
For Seaside School:
- Median: The median class size is the middle value, which is 20.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (25 + 25 + 27 + 27 + 28 + 28 + 28 + 30 + 31 + 35 + 36 + 38 + 40 + 43 + 45) / 15 = 31.13.
Part B:
For Mountain View School:
- Range: The range is the difference between the largest and smallest values, which is 29 - 10 = 19.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 20 and Q3 is 28. Therefore, the IQR is 28 - 20 = 8.
For Seaside School:
- Range: The range is the difference between the largest and smallest values, which is 45 - 25 = 20.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 27 and Q3 is 38. Therefore, the IQR is 38 - 27 = 11.
Part C:
If you are interested in a smaller class size, Mountain View School is a better choice for you because it has a lower mean and median class size than Seaside School.
what the reciprocal of 5/6 fraction
Answers
Answer:
6/5
Step-by-step explanation:
Which equation represents the statement, 42 is 6 times as many as 7?
Answers
Answer:
The correct representation of the given equation 6x7=42 in words is that 42 is 6 times as many 7.
Step-by-step explanation:
This is because, the product of 6 and 7 is 42. So, we sya 6 time 7 is 42 or 7 times 6 isi 42 means one and the same thing.
Answer:
6x7=42.
Step-by-step explanation:
7 is 6 times as many as 42 or 6 is 7 times as many as 42 or 42 is 6 times as many 7.
Find the area of the figure
Answers
Step by step: make it into two shapes by drawing a line through the shape which would be a square and a triangle. Area of square is bxh so 8x10=80
Area of triangle is 1/2(bxh) so 1/2(4x5)=10
80+10=90
Answer:
its b
Step-by-step explanation:
8*5=40
4*5=20/2=10
8*5=40
40+40+10=90
b is 90
can someone help? im not sure about this questons and its getting me so stressed out :( pls help :(
Answers
Answer:
Lets start:
Picture 1:-
1. Length of EH= 12cm
2. Angle G= 55 degrees
Picture 2:-
1. Scale factor= 1/4 (I'm not sure about this but this is what I think it is ;-;)
2. Value of y= 28 cm
Picture 3:- [Picture 3 is cropped so I'm guessing its the last one so imma answer those questions :D]
1. Scale factor= 5 (Again I'm not sure but its my best guess)
2. Value of z= 5
Picture 4:-
1. Scale factor= 4 (I'm pretty sure you know that my scale factor answers are guesses so yea ;-;)
2. Value of b= 12
Step-by-step explanation:
Since i can't add links in answers you can watch:
Similar figures
-By The Organic Chemistry Tutor
It'll help you understand how we solve these questions
Well anyways i hope this clears your concepts :D
Answer:
Step-by-step explanation:
EH is 12cm as the shape has been enlarged by scale factor two (all sides have been multiplied by 2).
Angle G remains the same at 55 degrees.
PART A
Scale factor for the triangle = 1/4
Value of y = 28cm
3) z = 5, scale factor = 5
SIMILAR RECTANGLES:
Scale factor = 4
Side b = 12cm
Hope these answers work out for you
This is the graph of f(x) = x+A/x+B. The grid lines in the graph are one unit apart. What is the value of A/B
Answers
The value of A/B is given as follows:
A/B = -2.
What are the asymptotes of a function f(x)?The vertical asymptotes are the values of x which are outside the domain, which in a fraction are the zeroes of the denominator.The horizontal asymptote is the value of f(x) as x goes to infinity, as long as this value is different of infinity.From the graph, the function has a vertical asymptote at x = 1, hence the value of B is given as follows:
B = -1 -> as x + B = 0 -> x = -B = -1.
When x = 0, y = -2, hence the value of A is obtained as follows:
A/-1 = -2
A = 2.
Then the division is given as follows:
A/B = 2/-1 = -2.
More can be learned about the asymptotes of a function at https://brainly.com/question/1851758
#SPJ1
Can someone help on Question C?
Answers
It's - b + a
Because we're going down the arrow on b or the opposite direction of b. Then, up to C where its vector is a as it lies half way on AC with half of the line labelled a. So, the other half must be also a.
Hope this helps!
You will now see two questions that may look a little different.
Simplify the following expression.
12 -2(x + 1)
Answers
12-2(x+1)
12-2x-2
10-2d
Which point is not on the graph of the function y = 2x?
(2, 4)
(4, 9)
(0, 0)
(5, 10
Answers
Answer:
(4,9)
Step-by-step explanation:
because its actually (4, 8)
To explain, if you follow the number line up the graph, and move up from 4x, it will show that the drawn line crosses at 8y, not 9y.
slope 2
.........................................................
screenshot 1: question
screenshot 2: answer options
thx
Answers
Answer:
A/m=-2. since x goes up by 2 on the table, y decreases by 4 on the table, but if the next part of x on the table was 6, then y would be -2.
At a recent football game of 8,450 in attendance, 150 people were asked what they prefer on a hot dog. The results are shown.
Ketchup Relish Chili
54 36 60
Based on the data in this sample, how many of the people in attendance would prefer ketchup on a hot dog?
4,225
3,380
3,127
3,042
Answers
By proportion that is:(54/150) * 8450= 54 * 56 1/3= 3042
Answer:
By proportion that is:(54/150) * 8450= 54 * 56 1/3= 3042
Step-by-step explanation:
A container has a cylinder shape has volume of 125.6 cm cubed the hight is 10 cm what is the radius . Also use 3.14 for pi
Answers
Substituting the given values, we have:
125.6 = 3.14 x r^2 x 10
Dividing both sides by 3.14 x 10, we get:
r^2 = 4
Taking the square root of both sides, we get:
r = 2 cm
Therefore, the radius of the cylinder is 2 cm.
Select the function that represents a geometric sequence
Answers
Answer:
c
Step-by-step explanation:
Since there are ten of them I will give 45 points (I only have 90) I'm giving you all my points for this guys. Please give me a real answer.
In the following questions, determine whether the equation has a solution, no solution, or an infinite number of solutions. Specify which, and then solve the equation if there is a solution.
7(x-5)=x+13
-6x=-5(x-1)-x
-4(x-2)=-2(x-17/2)
3-4x+5=2(8-2x)
2x+3=+2x
2x+3=2x+5
3x+9=2.5x+14
7(x-4)=4x+5
5x-20=-7x-20
3(2x+1)-4x=2x+3
Answers
Answer:
i only know 1. is 8
and also 5. 0= −3
Step-by-step explanation:
Answer and Step-by-step explanation:
7(x-5)=x+13
Distribute the 7, then solve for x.
7x - 35 = x + 13
6x = 48 (Added 35, subtracted x)
x = 8 (Divided by 6)
One solution
-6x=-5(x-1)-x
Distribute the -5, then combine like terms. Solve for x.
-6x = -5x + 1 - x (negative times negative equals positive)
-1 = 0 (Added 6x, subtracted the x from 1x, subtracted 1)
No solution
-4(x-2)=-2(x-17/2)
Distribute the -4 and -2, then solve for x.
-4x + 8 = -2x + 17 (negative times negative equals positive) (the 2's cancel out to be 17)
-9 = 2x (Added 4x, subtracted 17)
-9/2 = x
One solution
3 - 4x + 5 = 2(8 - 2x)
Distribute the 2, combine like terms. Solve for x.
8 - 4x = 16 - 4x
0 = 8
No solution
2x + 3= +2x
3 = 0
No solution
2x+3=2x+5
0 = 2
No solution
3x+9=2.5x+14
0.5x = 5
x = 10
7(x-4)=4x+5
7x - 28 = 4x + 5
3x = 33
x = 11
One solution
5x-20=-7x-20
12x = 0
x = 0
One solution
3(2x+1)-4x=2x+3
6x + 3 - 4x = 2x + 3
2x + 3 = 2x + 3
0 = 0
Infinite solutions (The reason why this one is infinite is because if you were to plug in any value for x, the result will equal itself, like the 0 = 0.
#teamtrees #WAP (Water And Plant)
Bummer! Kai has to pay sales tax! The sales tax rate is 5.75%. How much is the backpack?
(Original price: $88.95, 40% off )
Answers
What is the equation of this trend line?
Enter your answers by filling in the boxes.
K = ___ J + ___
Answers
Answer: K = -2J + 24
Step-by-step explanation:
24 is the intercept. The slope is -2.
24 is the intercept. The slope is -2.
Please Help
I need an answer ASAP
Answers
Which point is a solution to the system of linear equations?
y = −x + 2
x − 3y = 6
(−1, 3)
(0, 2)
(2, 0)
(3, −1)
Answers
If both of your equations are written in y-intercept form, You can start graphing. If not solve by having your equation in Y=mx+b form. Now you can graph and solve. The slopes and Y intercepts are different. Now we know they intersect at one point. Graph your equation (Rise/Run).
Y=-x+2
Y=1/3x-2
Hope this helps! :))
Please help!! Giving away 10 points 4 this‼️
Answers
Answer:
D) since -2 is to the left of 1, -2 < 1.
Step-by-step explanation:
U are welcome
ILL GIVE BRAINLIEST !!
Simplify the expression: 48% of 2500 – {(73 × 8) /√196} – 15% of (80/3)
2500 का 48% – {(73 × 8) /√196} – (80/3) का 15%
(86/21.5)^2 + {36/(√9×2)}^2
(86/21.5)^2 + {36/(√9×2)}^2
TYVM :)
Answers
48% of 2500 - (73×8/√196) - 15% of 80/3
\( \sf\frac{48}{100} \times 2500 - ( \frac{73 \times 8}{ \sqrt{196} } ) - \frac{15}{100} \times \frac{80}{3} \)
\( \sf\frac{48}{1 \cancel{00}} \times 25 \cancel{00} - ( \frac{73 \times \cancel8}{ \cancel{14}} ) - \frac{ \cancel{15}}{ \cancel{100}} \times \frac{ \cancel{80}}{ \cancel{3}} \)
\( \sf1200 - \frac{73 \times 4}{7} - 4\)
\( \sf1200 - \frac{292}{7} - 4\)
\( \sf1196 - \frac{292}{7} \)
\( \boxed{ \tt \: \frac{8080}{7} \approx \: 1154.28}\)
Answer: 1154.286
Step-by-step explanation:
Answer needed by 1:20pm (does anyone know how to find all answers to IXL Y.11???)
Answers
Answer:
91ft^2
Step-by-step explanation:
A = w*l
first, solve for the bottom rectangle
w = 7ft
l = 8ft
7ft * 8ft = 56ft^2
then for the second rectangle
l = 5ft
w = 7ft
5ft*7ft = 35ft^2
total area = rectangle 1+2
so 35ft^2+56ft^2=91ft^2
Answer:
The answer for the Area of the shape is 91ft²
Step-by-step explanation:
Area of the shape =Area of Bigger rectangle+ Area of small rectangle
A=L×B+l×b
A=7×8+5×7
A=56+35
A=91ft²
What value of x makes this equation true? -2x+3=-15
Answers
Answer:
x = 9
Step-by-step explanation:
-2x + 3 = -15
-2x = -15 - 3
-2x = -18
x = 9
Hope this helps! :)
Answer: 9
Step-by-step explanation:
-2x+3=-15(move 3 to the other side, it turn -3, -15-3=-18
-3 -3
-2x=-18(Divide -2 to the other side, -18•/•-2=9; if both number negative, the answer will be positive)
X=9
Which integer represents a withdrawal of $123?
-123
123
Answers
Answer:
-123
Step-by-step explanation:
When someone is withdrawing something there taking so of you are removing money Wich is represented as -x"x being the amount"
Answer:
-123
Step-by-step explanation:
its -123 because if you have lets say 200$ in your account. whats gonna happen if you take out 123$? you'll have 77$ left, because you subtracted it.
Sam has a deck that is shaped like a triangle with a base of 18 feet and a height of 7 feet. He plans to build a 2:5 scaled version of the deck next to his horse's water trough.
Part A: What are the dimensions of the new deck, in feet? Show every step of your work. (4 points)
Part B: What is the area of the original deck and the new deck, in square feet? Show every step of your work. (4 points)
Part C: Compare the ratio of the areas to the scale factor. Show every step of your work. (4 points)
PLEASE HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
6
Step-by-step explanation:
18-2.5+7 there s your helllppppppppppp
New base = 18 x 2/5 = 7.2 feet
New height = 7 x 2/5 = 2.8 feet
Therefore, the dimensions of the new deck are 7.2 feet for the base and 2.8 feet for the height.
Part B: To find the area of the original deck, we can use the formula for the area of a triangle, which is:
Area = (1/2) x base x height
Area = (1/2) x 18 x 7 = 63 square feet
To find the area of the new deck, we can use the same formula and plug in the new dimensions:
Area = (1/2) x 7.2 x 2.8 = 11.88 square feet
Therefore, the area of the original deck is 63 square feet and the area of the new deck is 11.88 square feet.
Part C: The ratio of the areas is:
63/11.88 = 5.303
The scale factor is:
2/5 = 0.4
To compare the ratio of the areas to the scale factor, we can divide the ratio of the areas by the scale factor:
5.303/0.4 = 13.2575
Therefore, the ratio of the areas is 13.2575 times the scale factor.
Tell whether each statement is True or False.
2(3-4y)=6-4y True or False
3+5(9+2n)=48+5n True or False
9-3(y-2)+3-3y True or False
3(6x-2)-7=18x-13 True or False
Answers
Answer:
3+5(9+2)= 48+5b true true
Answer:
1 F
2 F
3 F
4 T
Step-by-step explanation:
i need help with this question please help me
Answers
Answer:
The answer is D.
Step-by-step explanation:
y = mx + b
C = 5/9 (F - 32)
C = 5/9F - 5/9 (32)
Option (D) is correct.