Valerie is ordering salads and drinks for her friends. salads cost $7 each, drinks cost $3 each, and there is a $5 delivery charge per order. she has $50. if she buys 3 salads what is the maximum number of drinks she can buy

if x= number of salads and y= number of drinks, which of the following inequalities could you use to answers the problem

a. 7x-3y+5≤50
b.7x+3y+5≤50
c. x+y=50
d. 7x+3y+5≥50