What two consecutive numbers add up to 66

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9

Rewrite the point-slope equation in slope-intercept form: y - 3 = 2(x + 4)