This number is a square number, this number is a multiple of 9

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Find the 6th term of the expansion of (2p - 3q)11. a. -7,185,024p4q7 c. -7,185p4q7 b. -7,185,024p6q5 d. -7,185p6q5 select the best answer from the choices provided a b c d