This is a math test and i really need help. ill give brainliest

Oh boy, here we go:

17) 20

18) 135

19) 142

20) 14

21) No

10) B (I believe)

11) A

12) A

13) A

14) A

15) A (I don't know why these are all A...)

16) C (Yay, it's not A)

Step-by-step explanation:

I think you need this ASAP and don't want to wait for me to type this all out...

17.

45 + 5x + 35 = 180

5x + 80 = 180

x = 20

18.

5x + 35

5(20) + 35 = 135 degrees

19. Choice D. 142

20. Choice C

5x - 10 = 60

x = 14

21. Yes

10. Choice B (-3, -5)

11. Choice A (-3, 2)

12. Choice B, reflection across the y-axis

13. Choice A, y-axis

14. Choice A

15. Choice A

16. Choice A

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have