4. A school has a toy drive for a holiday in which students bring in toys to be donated to charity. The number of toys donated by juniors and seniors are summarized in the histograms. 55 55 50 50 45 45 40 40 35 35 30 30 number of juniors number of seniors 25 25 20 20 15 15 10 10 5 5 0 0 4 8 0 2 4 2 10 number of toys donated to charity 6 8 10 number of toys donated to charity Is the standard deviation of number of toys donated greater for seniors or juniors?

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.

1/2(2*4)=6 $$- agahajakanajak

30,40,50 is correct answer