If a triangle has sides of 4 meters, 7 meters, and 6 meters is it a right triangle

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Can someone me out here number 4 plz

The john nash mall used 17,4000 kilowatt hours in may, with a peak load of 92 kilowatts. the demand charge is $5.95 per kilowatt, and the energy charge is $0.08 per kilowatt hour. the fuel adjustment charge is $0.017 per kilowatt hour. what is the total electricity cost for may?