Please show all work. solve for the variable. x2−8=−1

x = ±

x = ±sqrt(7)

Step-by-step explanation:

x^2−8=−1

Add 8 to each side

x^2−8+8=−1+8

x^2 = 7

Take the square root of each side

sqrt(x^2) = ±sqrt(7)

x = ±sqrt(7)

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²