40 - 5x < -10 whats the answer?

x > 10

Step-by-step explanation:

1.1     Pull out like factors :

  50 - 5x  =   -5 • (x - 10)

2.1    Divide both sides by  -5

Remember to flip the inequality sign:

2.2      Add  10  to both sides

            x > 10

the answer would be c:   ax + b = ax + c

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15