What does this mean we never went over it..: Find the difference between 827 and 533. * Please tell me. Thank you!

I'm so close to finishing all these.

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%

If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?