A cell phone company charges $60 a month for up to 1 gigabyte of data. The cost of individual data is $0.35 per megabyte. If d represents the number of additional gigabytes, and c represents total charges at the end of the month, which linear equation can be used to determine a users monthly bill?

probably .5

i can on others if necessary.

i would say true? if the unit was informational and it "refreshed your understanding", then true.

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.