Question 345933
-3(5y)-5+4(7y+9)

Multiply -3 by each term inside the parentheses.
-15y-5+4(7y+9)

Multiply 4 by each term inside the parentheses.
-15y-5+28y+36

Since -15y and 28y are like terms, subtract 28y from -15y to get 13y.
13y-5+36

Add 36 to -5 to get 31.
13y+31