Time Warner is sending cable guy to your house to install internet and cable. The cable guy will be charging $50 fee plus $20 per hour. Write a linear equation for the amount the cable guy will
charge. If the cable install guy is working for 3 hours, how much did he earn?

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

what i would say the best answer is a. 40.5

tip $2.90

total $17.40

srry ask agian

step-by-step explanation: