Which of the following expressions represents a function?

{ (1, 2), (4, - 2), (8, 3), (9, - 3) }

y2 = 16 - x2

2x2 + y2 = 5

x = 7

Amy wants to build a cube with 3 cm sides like the one shown below using 1 cm cubes. How many cubes does she need?

What is the sum of this equation: 19x3 + (14x + 4x3)

Can you determine what number x represents from the information given? Explain how you got your answer.

Invested 28, 000 in two accounts, one yielding 8% and the other at 9%. If i receive a total of 2,440 in intrest at the end of the year, how much did i invested in each account

How to solve 67.8 * 0.45

The function f (x) = 18000 (0.52) x represents the value in dollars of a vehicle x years after it has been purchased new. What is the average rate of change in value per year between years 4 and 8? -$18000/year -$1219.87/year -$304.97/year -$0.

4x-6y=2 3x+5y=11 Jonas used the linear combination method to solve the equation shown. He multiplied the first equation by 3, and the second equation by another number to eliminate the x terms. What number did Jonas multiply the second equation by?

Larry purchase 8000 shares of a stock at a price of $7.29 a share. He sold the stock six years later at the price of $10.31 per share. What is this percent gap gain

What is the value of the expression - 7 - 5 + 4? A. -16 B. -8 C. -12 D. -6

What two numbers add up to - 3 and multiply to - 100?