Answer:
3rd one
Step-by-step explanation:
9x + 5y
Here, in 2x + 5y+ 7x, the 'like terms' are 2x and 7x, and the sum of these terms is 9x. Thus, 2x + 5y+ 7x becomes 9x + 5y.
alam ko sagot pero mataas lang
3 to the power of 1 simplified, is just 3.