Which of these relations are functions?

y = 5x = - 2

y = 2x - 5

2y = x - 4

Solve 6x-3y=-6 for y.

What is the answer to 0.55 divided by 100

Log (x+2) base 5 - log (x) = log (2x-1) base 5 - log (3x-12) base 5

The cost of having a package delivered has a base fee of $9.70. Every pound over 5 lbs cost an additional $0.46 per pound. Write a linear model that represents the cost, C, for the total weight, w, in pounds of the package. Assume 5 lbs. a. C = 9.

What is 2 3/8 times 16

10-19. Find the area of a regular polygon with 100 sides and with a perimeter of 100 units.

5) Rosselyn, Jacqueline, and Susan are going to buy snacks after school, so they want to check how much money they have. Rosselyn has $12 more than Jacqueline. Susan has $15 more than Jacqueline.

2 numbers whose sum is 832

Marco estimated that he took his dog on a 2.5 mile walk. When he drove the same route in his car, he found out that it was 2.65 miles. What is the percent error between Marcos estimate and the actual amount?

What are the earnings for: 1. 5 days at $69.00 a day = $ a0 2. 3.5 days at $27.75 a day = $ a1