lxwxh = v 2 x 2 x 2 = 8 7x8=56 Answer: 7
Answer: Choice D) 
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Work Shown:

Explanation:
First I subtracted y/b from both sides. Then I multiplied both sides by 'a' to fully isolate x. You can optionally distribute the 'a' through to each term inside the parenthesis, but your teacher has chosen not to do this.
Elga's age is 50, and Alvin's age is 56. So, the sum of their ages is 106.
Answer:
the answer for number 1 is 18
the answer for number 2 is 14
the answer for number 3 is 50
Rational Number are set of numbers that can be written as a/b where a and b are integers, but b is not equal to 0; an integer or a fraction; for example: 6 can be expressed as 6/1 and 0.5 can be expressed as 1/2.