Write the equation for the inverse of the function.
y = cos 2x
a. y = cos- 2x
y = costa
9
b. y--cos+22
d. - costx
in
select the best answer from the choices provided

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

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

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?