Question

Solve using the guess-and-test strategy.

Michael and Susan have a combined age of 17 years. Michael is 5 years older than Susan.

How old is Michael?

A.
5

B.
6

C.
11

D.
22

Answer 1

11

Answer 2

c. 11

Answer 3

Well, since the "combined ages" are 17, you know that his age has to be less than that.

Answer 4

thanks!!!

Answer 5

let Susan = x years
then Michaels = (x + 5) years

x + (x + 5) = 17
2x + 5 = 17
2x = 17 - 5
x = 12/2
x = 6

so michael = 6 + 5 = 11