[Help fast, will mark brainliest] Consider the following expression. 3x+2y+5+9y Select all of the true statements below.

2y and 9y are like terms

3x is a term

5 is a constant

Step-by-step explanation:

To answer this question, you need to know the definitions of terms, like terms, factors and coefficient.  

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.