Substitute the values of x and y into the expression -3x 2 + 2y 2 + 5xy - 2y + 5x 2 - 3y 2. match that value to one of the numbers.

1. x = 2, y = -1
9.17

2. x = 0, y = 2.5
-11.25

3. x = -1, y = -3
14

4. x = 0.5, y =
0.44

5. x = , y =
1.665

6. x = √2, y = √2
-1

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18