Which expression results in a sum or difference of three and ten forty seconds? six and five sevenths minus three and two sixths

four and two sixths plus two and three sevenths

eight and eight fourteenths minus five and one third

five and one third plus one and three fourteenths

55? i think maybe

step-by-step explanation:

you need to give us more information since we can't answer

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.