Jeremiah and Nevaeh each spent a total of $9 on packages of trail mix, a, and bottles of water, y, for a hike. The following system of
equations can be used to find the cost of each package of trail mix and each bottle of water.
Jeremiah: 29: + 4y = 9
Nevaeh: 32 + y = 9

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315