X = 10 and y = -2, what is the value of the expression 9x-3y+8xy-3

A -61
B -67
C 241
D-79

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?

Travis and paula went to lunch.travis ordered a sandwich for $7.50 and paula ordered a burger for $5.25.after lunch,they left a 15% tip for the waiter.how many money did they spend altogether?