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Burka [1]
3 years ago
7

There are a total of 20 students. In a classroom, the probability that the teacher chooses a boy from 20 students is 0.45. How m

any students are not boys
Mathematics
1 answer:
jasenka [17]3 years ago
6 0
.45= 45%
100%(total)-45%(boys)=55%(or .55; not boy)
%*Total=Part
.55*20=11
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Javier is 175% heavier than his brother. If Javier’s brother weighs 80 pounds, how much does Javier weigh?
bija089 [108]

Answer:

140

Step-by-step explanation:

175% of 80 = 140

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3 years ago
I have a circular pool that I want to put a cover over. The pool is 16 feet across. About how many square feet of material will
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I need help with this problem
Anarel [89]

The midpoint lines are half the opposite side length.

Line DE is given as 7 , So Line F = 7 x 2 = 14

Line EF is given as 12, so Line D = 12 x 2 = 24

Line DF is given as 16, so line E = 16 x 2 = 32


The perimeter is the sum of the 3 sides:

Perimeter = 14 + 24 + 32 = 70

6 0
3 years ago
A painter is painting a rectangular wall that measures 23.6 ft by 19.2 ft. Each gallon can of paint covers 200 square feet. What
ludmilkaskok [199]

Answer:

3 gallons

Step-by-step explanation:

Length of the rectangular wall = 23.6 feet

Width of the rectangular wall = 19.2 feet

Surface area of the wall = 23.6 × 19.2

                                        = 453.12 square feet

∵ 200 square feet of the wall is covered by the amount of paint = 1 gallon

∴ 1 square feet of the wall will be covered by the amount of paint = \frac{1}{200} gallons

∴ 453.12 square feet will require the amount of paint = \frac{453.12}{200}

                                                                                         = 2.2656 gallons

Therefore, minimum 3 gallons will be required to paint the wall.

5 0
3 years ago
Select all the true statements. Triangle A B C where the measure of angle A is 2 x plus 1 degree, angle B is x degrees, and angl
Step2247 [10]

Answer:

B= 41; C  = 56; A = 83

Step-by-step explanation:

Given

A = 2x + 1

B = x

C = x + 15

Required

Arrange the angles from smallest to largest

First, we need to determine the value of x.

Since, it is a triangle:

A + B + C = 180

Substitute values for A, B and C

2x + 1+ x + x + 15 = 180

Collect Like Terms

2x + x + x = 180 - 15 -1

4x = 164

Solve for x

x= 164/4

x= 41

Solve for A, B and C

A = 2x + 1

A = 2 * 41 + 1

A = 82 + 1

A = 83

B = x

B= 41

C = x + 15

C  = 41 + 15

C  = 56

From Smallest to Largest, we have:

B= 41; C  = 56; A = 83

6 0
3 years ago
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