A. D: −2≤x≤3; R: −4≤y≤4 B. D: −3≤x≤4; R: −2≤y≤4

C. D: −2≤x≤3; R: −1≤y≤4

D. D: −4≤x≤2; R: −3≤y≤4

15 batches are the most you can make

step-by-step explanation:

triangle and cube

step-by-step explanation:

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.