Multiply using distributive property: - 5 (10 + 3y) =

-50 - 15y

Step-by-step explanation:

-5 (10 + 3y)

First distribute the - 5 by multiplying it by 10 and 3y

(-5 x 10) + (-5 x 3y)

Than simplify

(-50) + (-15y)

Adding a negative is like subtracting a positive so you can turn (-50 + - 15y) into (-50 - 15y)

Than you have your answer

-50 - 15y