Question 1 (1 point) (03.01 LC)
Which expression is equivalent to 2m - 4) + 1? (1 point)
a
2m - 7
b
2m - 3
ос
2m +9
2m + 10

70

step-by-step explanation:

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.

hm let me think hm think think hm think yes