Ok, I really need your guy's help like ASAP rn I'm having trouble with some math equations: 1. 5m+9n if M= -7 and N= 4.
2. (18-AB) + 4b if A= -2 and B= -5
thank you so much.

1.  

5m + 9n

Plug in the numbers

5(-7) + 9(4)

Multiply

- 35 + 36

Solve.

36-35=1

2. 18-(-2*-5))+4(-5)

(18-10)+(-20)

8+(-20)

-12

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere