*grade 9 work*

10 answers
Question:

*grade 9 work*

[tex]Show your work!!! *grade 9 work*[/tex]


Answers

Hey there! :)

r ≈ 4.38 cm.

Step-by-step explanation:

Find the radius by working backwards using the equation A = πr²:

Given:

A = 60.24 cm²

π = 3.14

Plug these into the equation:

60.24 = 3.14r²

Divide both sides by 3.14:

19.185 = r²

Take the square root of both sides:

r ≈ 4.38 cm.

675 students will wear masks

Step-by-step explanation:

3/8 of the student do wear masks.  Thus, simply do 3/8*1800 to get that 675 students wear masks.

Hope it helps <3

Hope this helps <3

Step-by-step explanation:

[tex]V=4000+4.75n\\\\Substitute\\V = 4000 + 4.75(6)\\\\Multiply\\\\V = 4000+28.5\\\\Add\\\\V = 4028.5[/tex]

1. 10 : 24 = 5 : 12 = 20 : 48 = 40 : 96

2. 2 : 3 : 5 = 4 : 6 : 10 = 8 : 12 : 20

180

Step-by-step explanation:

5(2)^2 (3)^3

5(4) (27)

4(27) = 108

5(108) = 540*

4028.5

Step-by-step explanation:

V=4000+4.75 (6)

V= 4000+28.5

V=4028.5

Please Vote Brainliest!

5 boys

Step-by-step explanation:

boys to girls in math class = 3/12

3/12 can be reduced to 1/4

In the science class, the ratio is the same but there is a total of 20 girls.

Multiply the fraction 1/4 by 2/2, 3/3, 4/4, 5/5, etc. until you get x/20. Then you have 20 girls. x is the number of boys.

1/4 = 2/8 = 3/12 = 4/16 = 5/20

In science the ratio of 1/4 is the same as 5/20, so there are 5 boys.

5 boys

6) The perimeter of the triangle is 3(3x - 1)

7) The perimeter of the rectangle is 2(5b + 4)

Step-by-step explanation:

The perimeter of a triangle and a rectangle is found by adding up all the sides.

6) Perimeter of triangle = 3x - 3 + 4x - 1 + 2x + 1 = 3x + 4x + 2x - 3 - 1 + 1 = 9x - 3 = 3(3x - 1)

7) Perimeter of rectangle = 2(L + B) = 2(3b +5 + 2b - 1) = 2(5b + 4)

675 students are wearing masks.

Step-by-step explanation:

3/8(1800)=675

72 cm or 6 square root of 2

Step-by-step explanation:

a^2+b^2=c^2

6^2+6^2=c^2

36+36=72

c= 72 cm.  or 6 square root of 2

hope this helps.

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