The computer lab offers classes after school. In addition to an hourly rate, h, a registration fee, f- is charged. The equations below model the cost for a 2 hour and 3 hour class.
2h + f = 65
3h + f = 90

A.$30
B.$25
C.$35
D.$15

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Examine the two-step equation. − 7 4 + x 4 = 2 which property of operations allows you to add the same constant term to both sides? amultiplication property of equality bdivision property of equality caddition property of equality dsubtraction property of equality

Which one is the correct answer, and why?