Answer:
1)+5
2)-6
3)+15
4)-4
I hope they are all right :)
Step-by-step explanation:
Hey there!


when x = 3 and y = 9
Let's first move to x and y.

Now multiply 5 by x and y(3+9).

Now we have the number 2 left, so we have to multiply 60 by 2.


Hope this helps!

91.125 all you need to do is cube 4.5 or multiply 4.5 by itself 3 times so 4.5x4.5x4.5