Question

*WILL GIVE BRAINLIEST TO WHOEVER HAS A DETAILED ANSWER*

Answer 1

Y * 10 = z

y = dollars
z = dimes

4 dollars = 4y

Replace y with 4:
4* 10 = 40.

The total amount of dimes in 4 dollars is 40 dimes.

Hope this helped☺☺

Answer 2

Well to find the answer, we must remember that Y stands for Dollars and that Z stands for the number of dimes. We are also provided the amount of dollars (4)

So to find the answer substitute 4 for y in the equation
4 x 10 = Z

Solve for Z
4 x 10 = 40
Z = 40