Find an expression which represents the sum of (9x+4y) and (-6x+4y) in simplest terms.

What is the measure of ac? 5 units 13 units 26 units 39 units

For what value of (y) is 3^3/3^y =1/9

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3