Mason gave the waiter a $14.58 tip, which was 15 percent of the dinner bill. what was the amount of the dinner bill before he added the tip?
a. $9.72
b. $21.87
c. $97.20
d. $218.70

Option C.

Step-by-step explanation:

Let x be the total amount of the dinner bill.

It is given that Mason gave the waiter a $14.58 tip, which was 15 percent of the dinner bill.

Multiply both sides by 100.

Divide both sides by 15.

The amount of the dinner bill before he added the tip is $97.20. Therefore, the correct option is C.

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: