Terry has between 50 and 100 pennies and her piggy bank. she can count them two at a time and come out even. she can also count them three and five at a time and come out even. she cannot count them 4 at a time and come out even. how many pennies does she have?

90

Step-by-step explanation:

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: no, but if it does it's a obvious pattern.

step-by-step explanation: