Your utility company charges 12 cents per kilowatt-hour of electricity. How much does it cost to keep a 150-watt light bulb on for a week?

5 x 75 = 375w (5 bulbs added up) 1.5 x 375 = 562.5w (running for an hour and a half) 562.5/1000 x 10 = 5.525 cents. 1 Kwh is 1000w running for 1 hour.

Step-by-step explanation:

Step-by-step explanation:

9y + 12 = 4y - 10

Sub. 4y from both sides

5y + 12 = 10

Sub. 12 from both sides

5y = -2

Divide 5from both sides

y = -2/5

Substitute -2/5 into 4y - 10