Answer:
-36p+23q-10r
Explanation:
It just says to simplify, meaning you just need to combine like terms.
-5 x 9p = -45p
-5 x -4q = 20q (negatives cancel out each other)
-5 x 2r = -10r
after that you combine like terms:
9p + (-45p) = -36p
3q + 20q = 23q
there is no other term that can go into r, so you just leave it as it is.
so the final answer comes to -36p+23q-10r