Another one pleasd help. Paula charges an hourly rate for babysitting. Last month she worked 12 hours babysitting and earned $81. What does Paula earn per hour?

She charges $6.75 per hour

Step-by-step explanation:

If she charges an hourly rate, the number of hours should be multiplied by the hourly rate to get the total amount of money earned.

Variable x = hourly rate

The equation should be set up as:

12x = 81

This equation says 12 hours times the hourly rate equals $81

How we solve is by isolating the variable

To isolate the variable, we divide both sides by 12

12x ÷ 12 = 81 ÷ 12

1x = 6.75

x = 6.75

Her hourly rate is $6.75

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb