Ahiker starts at an elevation of 65 feet and descends 30 feet to the base camp. what is the elevation of the base camp?

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

Angie has saved 3/8 of the amount she needs to buy a bike. clive has saved 7/10 of the amount he needs to buy a skateboard. what is the difference between clive's and angie's fraction of savings?

The sum of four times a number and three is two times the number minus twenty nine