You want to determine the number of students in your school who have visited an art museum. You survey 36 students in the art club. Twenty-seven have visited an art museum, and nine have not. So, you conclude that 75% of the students in your school have visited an art museum. Determine whether the conclusion is valid.

The sample is large enough, representative of the entire population, and chosen randomly so the conclusion is valid.

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.

step-by-step explanation: