Homework Help ASAP! David sanded a dresser for 1 1/4 hours. Then stained the dresser for 2 1/3 hours. Select True or False for the statement. A common denominator of the mixed numbers is 12?

True

False

The statement is true

Step-by-step explanation:

The denominators of the fractions are 3 and 4. The least common multiple of those numbers is 12, making the least common denominator 12.

10

step-by-step explanation:

7+3=10

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.