A total of 84 quarters are lined up side by side on a table. You replace every second quarter with a dime .after you have completed this task, you replace every third coin with a nickel once this is completed you replace every fourth coin with a Penney what is the total value of the final 84 coins on the table

21

step-by-step explanation:

11279

the answer is 489

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.