Answer:

Step-by-step explanation:
Let
y --->Mala's age
x---> sister's age
we know that
---> equation A
so
The sum of ages of the sisters is

substitute equation A in the expression of the sum of ages

simplify

Answer:
36 apples and 18 oranges
Step-by-step explanation:
4x+2x=54
6x=54
x=54/6
x=9
Apples=4x=36
Oranges=2x=18
The answer is 8. you are basically adding 13 to -5. so it would be 13-5=8.
For 1. The bike is going 24 miles in 3 hours. To figure out how many miles it went in 1 hour you divide 24/3 which is 8 miles. If the bike went 8 miles per hour then you may now multiply it by 10 to find the total mileage in 10 hours. 10x8=80