Mahpee was selling magazines subcriptions. he earned $4.25 plus $0.50 for each subcription he sold and earned a total of $11.75, how many subcriptions did he sell?

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1