PLEASE PLEASE PLEASE PLEASE HELP

l = 25, w = 25

Step-by-step explanation:

l = x

w = 50-x

A = x(50-x)

differentiate in terms of x

find when = 0

l = x = 25

w = 50-x = 50-25= 25

the length and width that will give you the maximum area is l = 25, w = 25

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

answer is 67%

step-by-step explanation: