Answer please? I need it for homework

boys = 150

girls = 350

Step-by-step explanation:

I'm not sure what a tape diagram is, but I can get the answer.

Let b = boys

Let g = girls

3/7 = b/g

3/7 = b/(b + 200)

3(b + 200) = 7b

3b + 600 = 7b

600 = 4b

b = 600/4

b = 150

g= 150 + 200

g = 350

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6