Melanie bought 4 large gifts and 2 small gifts. mary bought 1 large gift and 20 small gifts. each small gift costs $10. they both spent the same amount of money. what's the price of one large gift?

the price of one large gift is $60

Step-by-step explanation:

Let x represent the cost of one large gift.

Melanie bought 4 large gifts and 2 small gifts. Since each small gift costs $10, it means that the total amount that Melanie spent is

4x + 2×10 = 4x + 20

Mary bought 1 large gift and 20 small gifts. It means that the total amount that Mary spent is

x + 20×10 = x + 200

They both spent the same amount of money. This means that

4x + 20 = x + 200

4x - x = 200 - 20

3x = 180

x = 60

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: