the cost for a pack of 15 pens is $3.15. find the unit price in dollars per pen. if necessary, round to the nearest cent

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by p(c)= -15c(c-8) what current will produce the maximum power?

Point m is located at (-4, -6). what is located 4 units from point m? ( its on a coordinate plane by the way. )