FACTOR
x^2 + 10× - 2400 = 0​

x= -5 + 5, x= -5 - 5

Step-by-step explanation:

Since this quadratic is set to zero, we can use the quadratic formula to solve this.

x^2 + 10x - 2400 = 0​

Quadractic formula =  x= -b +- /2a

For this equation:

a= 1, b=10, c=-2400

Plug these numbers into the equation and solve.

x= -10 +- )/2(1)

x= -10 +- /2

x= -10 +- /2

x= -10 +- /2

x= -10 +- 5 * 2/2

x= -10 +- 10 / 2

Divide by 2.

x= -5 +- 5

x= -5 + 5 or x= -5 - 5

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.