The sum of the squares of the digits of a positive two-digit number is 20, and the tens digit is 2 more than the units digit. find the number.

What is the slope of a line that is perpendicular to y = 3x + 1

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

If g(x) is an odd function, which function must be an even function?