The ratio of ben’s to shabu’s Age is 2:8 respectively. If the total of their ages is 90, how old is Ben?

18.

Step-by-step explanation:

First, add the ratio numbers together: 2 + 8 = 10

Next, divide the total age from the added ratio: 90/10 = 9

Each "one" represents 9.

Ben is the "two", so multiply 2 with 9: 9 x 2 = 18

Ben's age is 18.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^