Which statement describes a unit rate? Group of answer choices

Sara ate 1 cookie

Sara is driving 16 miles

Sara is driving 30 miles per 1 hour

Sara ate 3 crackers and 1 appl

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.

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation:

my guess is

step-by-step explanation:

b

step-by-step explanation:

i dont know