If you run a marathon of 26 1/5 miles in a time of 5 4/5 how far do you run in 1 hour

To answer this question, we can set up a proportion. Let's convert the values to fractions first:

On the left side will contain the known information, and the right side will contain the unknown - how far you run in an hour:

Then we can cross multiply and solve for x:

Then we can multiply by the reciprocal on the left to cancel out the coefficient and only get x:

So now we know that in 1 hour you will run miles or 0.221 miles.

is there answer choices?

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.