7. You have only nickels and dimes in your piggy bank. When you ran the coins through a change counter, it indicated you have 590 cents. Write an equation that represents this situation. What are
three combinations of nickels and dimes you could have?

this is answer of 144 cubic meters

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.

493 would be the correct answer

step-by-step explanation: