HELP ME ONLY IF YOU KNOW THE ANSWER! 10. Tell whether the sequence is arithmetic. If it is, what is the common difference?
2,7,13,20,...

no
yes: 2
yes; 6
yes; 5

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.