Answer:
to find the distance between two points on a coordinate plane
Step-by-step explanation:
yes
If Jiri is x, Pamela is x -5, and tehri ages combined would be 35 so;
x + x-5 = 35
collect the like terms
2x-5 = 35
add five to both sides
2x= 40
divide both sides by 2
x=20
Jiri's age is 20
5a - 10*3 = 45
5a - 30 = 45
5a = 45 + 30
5a = 75
a = 15