Answer:
the simplified version of -5(a-9) would be -5a+45.
Step-by-step explanation:
What you have to use is the distributive property. You first take -5 and multiply it by each of the numbers inside. So, you do -5*a which is -5a and then you do -5*(-9) which is +45. You finally put everything together and you get -5a+45.
