Answer:
X=2y-3
Step-by-step explanation:
Let Rebecca's age be x
Let Anthony's age be y
Twice Anthony =2y
Rebecca's age (x) to be 3 years younger than twice Anthony's =2y-3
So, it's x=2y-3
90,180 is the same as R so it is
C
both 4 and -4 are 4 units away from 0
21.60
First find the tip
18 * 20%
18 *.2
3.60
Then add it to the cost of the haircut
18 + 3.60