Which of the following expressions represents a function?

a.{(1, 2), (4, –2), (8, 3), (9, –3)}
b. y2 = 16 − x2
c.2x2 + y2 = 5
d. x = 7

Akitchen floor is made up of tiles that are in the shape of the triangle shown there are 40 tiles on the kitchen floor what is the total area of the floor

Which of the following is a proper fraction? a. 9⁄8 b. 5⁄6 c. 7⁄3 d. 4⁄2

Which equation represents the line that passes through the points and (4, 10) and (2, 7)? y = 3/2x - 11y = 3/2x +4y = - 3/2x + 19y = - 3/2x + 16