the cost, c, of a health club membership is related linearly to its length in months, m. if a 12-month membership costs $260 and
an 18-month membership costs $380, which equation can be used to find the cost of a 30-month membership?

Asap! i'm not good math and i'm lost.

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.