CAN SOMEONE PLEASE HELP ME

Don't know how to find x given these segment lengths

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons