What is the gcf of 28x and 16x

X+ y = 5 ; x - y =3 solve using linear combination

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

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%