Melanie spent four hours babysitting. she charges $16 upfront and then an additional charge per hour. the total amount she earned can be represented by
the expression $4x + $16. what expression represents the amount she earns each hour?

4 dollars

Step-by-step explanation:

The slope is the amount she earns each hour.

-6 is the correct option from the above given options

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.