What is 23 squared? which one of the following numbers is a multiple of 8? a. 512 b. 124 c. 27 d. 98

When you square a number, you simply multiply it by itself. Since 23*23 is 529, The first questions answer is such. 

When something is a multiple of a number, it means that it can divide into a whole number.  Since 512 can be divided into a whole number by 8 (512/8 = 64) The correct response would be A.

5\16 x 2\5 = 10/80simplify to 1/80

Set up a system of equations