"A sloped mountain road is 12.7 km long. It covers a horizontal distance of 8.9 m.
What is the change in elevation of the road?"

My question about this question is. if the length of the mountain (b) is 12.7 how can the hypotenuse (c) be 8.9 m which is less than b? The Pythagorean theorem states that c > b and a

Is this not a right angled triangle? My test is about the pythagorean theorem.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

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the answer is:

mean: 6

mad: 2.14

answer: the answer is 110