The diagram shows rays of light from a point source, p, that reach a detector, d, along two paths. one path is a straight line, while the other is bent by reflection off a mirror. what is the value of b, correct to one decimal place? assume that all the points in the diagram lie in the same plane.

5.4

4.2

3.6

2.8

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x