Rachel and Amanda are planting tulip bulbs. Rachel has planted 36 bulbs and is planting at a rate of 15 bulbs per hour. Amanda is planting at a rate of 18 bulbs per hour and has planted 30 bulbs. How long will it take Rachel and Amanda to plant the same number of bulbs? How many bulbs will that be?

Step-by-step explanation:

This problem is on the combined work rate.

step one:

given that Rachel has plants at 15 bulbs per hour

and Amanda plants at 30 bulbs per hour

1/15+1/18=1/T

18+15/270=1/T

33/270=1/T

11/90=1/T

60

step-by-step explanation:

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: