The equation x2 – 1x – 90 = 0 has solutions {a, b}. What is a + b? –19 –9 1 10

x^2-x-90=0     x^2-10x+9x-90    x(x-10)+9(x-10)

(x+9)(x-10)=0

Solutions are 0-9=-9 and 0+10=10.

10-9=1= a+b

Step-by-step explanation:

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