Tammy and jodi assembled 420 circuit boards in 8 hours. the next day they assembled 36 more circuit boards in the same amount of time. what was their average rate on the second day? a. 87 boards per hour b. 70 boards per hour c. 57 boards per hour d. 36 boards per hour

i believe that is true.

step-by-step explanation:

hope my answer has you if not i'm sorry.

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