What is the value of the ecpression 2x^2+3xy-4y^2when x=2 and y=-4?

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?

1: 4 if the wew 35 surfboards at the beach how many were short boards?

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