How old is david if his age 6 years from now will be twice his age 7 years ago?

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.