What's the answer to 5-y=18

Which relation is a function? { (2, 3), (1, 5), (2, 7) } { (-1, 5), (-2, 6), (-3, 7) } { (11, 9), (11, 5), (9, 3) } { (3, 8), (0, 8), (3, - 2)

Samantha wants to find the height of a pine tree in her yard. She measures the height of the mailbox st 3ft and its shadow at 4.8ft. Then she measures the shadow of the tree at 56ft. How tall is the tree?

Kristin spent $128 on shirts. Fancy shirts cost $20 and plain shirts cost $10. If she bought a total of 8 shirts, then how many of each kind did she buy?

Evaluate the expression. 6 x - 9 - 6 : - 2

Peter drives on a straight road and stops at an intersection. the intersecting road is also straight. peter notices that one of the angles formed by the intersection is a right angle.

Each side of an equilateral triangle measures 9cm. Find the height, h, of the triangle.

Which equation represents a proportional relationship? A) y = 3x 4 B) y = 3 4x C) y = 3x 4 + 1 D) y = 3 4x + 1

1). Find the slope of the line: 8x+4y-16=8 2). Slope of a line perpendicular to the line: Y+4=4x+1

Solve for y. 3y - 12 = - 30? A - 6 B - 2 C 2 D 32

Prove the identity with steps. sin (x-y) / cos x sin y = tan x cot y - 1