Atrain leaves the station traveling west at a constant rate of 45 mph. an express train leaves the same station 1 hour later heading west on the same route, traveling at a constant rate of 60 mph. how many hours will the first train have been traveling when the express train catches up to it?

a. 3
b. 4
c. 5
d. 6

Hurry and answer this! circle x with a radius of 6 units and circle y with a radius of 2 units are shown which steps would prove the circles similar? translate the circles so they share a common center point, and dilate circle y by a scale factor of 4. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 4. translate the circles so they share a common center point, and dilate circle y by a scale factor of 3. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 3

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers