An elementary school is having a reading contest, to see which class can read the most number of minutes over the month. each week, the teachers add up the number of hours their students have read at home and in school. what is the best way to display these weekly totals to show which class is ahead in the contest?

a. bar graph
b. scatterplot
c. box-and-whisker plot
d. histogram

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.