Use the figure below to answer the following questions. What is m∠1?

70
50
90
40

40

Step-by-step explanation:

why ? because the total angle measure in triangle is 180degree so we have a right angled triangle so 90+50 = 140

180-140 = 40

hope it's correct

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.