Mr's rodman's class sold candy bars for $1.25 each and mr's powell's class sold water bottles for $0.75 each to raise for the math department. together, they sold 92 items and made $87.50 for the math department a. write and solve a system of equations that models the problem. show any work that is required. b. which class earned more money? hence how much more money did they earn? c. which class sold more items

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21