A student performed the following steps to find the solution to the equation x2 - 2x - 15 = 0. Where did the student go wrong?
Step 1. Factor the polynomial into (x+3) and (x - 5)
Step 2. X+ 3 = 0 and XI 5 = 0
Step 3. x = 3 and x = -5
A. in Step 3
B. The student did not make any mistakes, the solution is correct
c. in Step 1
D. in Step 2

no solution exists the way you wrote the equation.

-8,5

step-by-step explanation:

you start with 40 minutes and 8 people to paint a wall. then it asks how many minutes does it take 10 people to paint seven walls.

that means you start with division.

40÷8=5

now you have to multiply that by 10

10×5=50

now you want to multiply the amount of walls by number minutes.

50*7= 150 minutes or 2½hrs

hope this ! -john