The sum of two numbers is 13 and their difference is 7 What are the two numbers ? Smaller number Larger number HELP ASAP

What is the product of the radical expression. (7-2square root) (8+2 square root)

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%