Elga is 20 years old and Alvin would be 5. Hope this helped.
Answer
The annual payment will consequently decrease
Step-by-step explanation:
If the APR charged say on a mortgage loan is decreased, then the total repayments due will as a consequence decline provided the repayment term remains unaltered. Nevertheless, a decline in total repayments due amounts to a decrease in the annual repayments
You have a lot of questions here, I can help you with a few of them.
When you simplify the polynomials, you put together all of the terms that have the same degree. That means the variables have the same exponents. The number of terms are the items separated by plus and minus signs.
Here are the answers for the first three:
1)

2)

3)
For this you divide the total spent by the total number of pizzas...
16.50/ 3 = $5.50 per pizza.