During a recent blood drive, 18 donors had type o blood. this was 45% of the total number
of donors who gave blood that day. how many donors participated in the blood drive?

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Twelve less than a number is at most 20

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?