Can someone please help me with this please?

10a.) 6   10b.) 4 sopranos, 10 altos, and 6 tenors

Step-by-step explanation:

24:60:36

these can all be divided by 6, or their gcf

So each group would have 4 sopranos, 10 altos, and 6 tenors

Hope this helps :) And sorry, I couldn't quite get the last two

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.

if i put something wrong your not gonna like it so rather not say nothing.