help me will give brainlist

600/5 equals 120 so 1/5 of the students equal 120 so if theres 2/5 boys that means 120 x 2 equals 240 and 120 x 3 equals 360 and hoped i helpes need me to explain more just let me know

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wegnerkolmp2741o wegnerkolmp2741o · Answer 2 · 2019-01-22T23:14:58+01:00

Answer:

Problem 9

The tree is 16 2/3 ft

Problem 10

a) There are 360 girls and 240 boys

b) 2/5

c)40%

d) We need 24 teachers

Step-by-step explanation:

Problem 9

We can use similar triangles

5 tree

--------- = ----------------

11.7 39

Using cross products

5*39 = 11.7 * tree

195 = 11.7 * tree

Divide by 11.7

195/11.7 = 11.7*tree

16.666666 = tree

The tree is 16 2/3 ft

Problem 10

girls : boys : total

3 : 2 : (3+2)

3 : 2 : 5

We need to get to a total of 600

600/5 = 120

Multiply each term by 120

girls : boys : total

3*120 :2*120 : 5*120

360 : 240 : 600

a) There are 360 girls and 240 boys

b) fraction that are girls

girls/total

360/600

Divide by 10

36/60

Divide by 6

6/10

Divide by 3

2/5

c)Percent that are boys

240/600 = .4

Multiply by 100%

40%

d) There are 25 students per 1 teacher

Take 600 students and divide by 25

600/25=24

There are 24 groups of 25 students, so we need 1 teacher per group.

We need 24 teachers