A car that Sophia wants to buy costs $21,000. She does research and finds that after 14 years the car depreciates to a value of zero. If the car depreciates in straight line form, write the straight line depreciation equation.

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.

Abag contains pieces of paper numbered from 5 to 9. a piece of paper is drawn at random. what is the theoretical probability of drawing a number less than 8?