Reduce the fraction to its lowest term assume denominator are equal to 0
1/1+-2/4n+4/-1​

.5 lb

step-by-step explanation:

12 in / 6 in =2 in

.25 x 2 = .5 lb

i think it would be 42cm

126 maybe. sorry

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.