The ratio of pencils to erasers is 4:1 if there are 20 pencils how many erasers are there?​

The answer is 5

Step-by-step explanation:

That's the answer because E in this equation equals the new number of erasers when you have 20 pencils. The answer is 5 erasers.

5 i believe

Step-by-step explanation:

i think thats whatnit is

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.