Boron is ten years older than his sister in three years he will be twice as old as she is now. how old are they now?

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

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%

3x = 729 solve for x plz . it's urgent. will mark