two integers, n and p, have a product of -18. what is the largest possible sum of n and p?

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

An alternative to car buying is to make monthly payments for a period of time, and then return the vehicle to the dealer, or purchase it. this is called

3x + 4y = 5 x- 3y = -7 solve by substitution