the ratio of girls to boys in the sixth grade are 5:3. If there are 400 sixth graders, how many boys are there?

150 boys

Step-by-step explanation:

5+3=8

Divide the whole group by 8

400/8=50

Now just multiply the number times the amount of boys per group

=150 boys

a) Perimeter of old garden=6w+8

b) A = 2W^2+4W

Step-by-step explanation:

old Area = length * width

= L * W

the old perimeter = half of the new one, so it is 6w+8

the old perimeter has to equal 2L + 2W

2L+2W=6W+8

2L=4W+8

L=2W+4

Area=L*W

so

A=(2W+4)(W)

=2W^2+4W