Simplify the following expressions: x−(x−14)
thanks this should be easy I'm just working on other problems right now and don't want to deal with it

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

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