If f(x) and f–1(x) are inverse functions of each other and f(x)=2x+5, what is f–1(8)?
a: –1
b: 3/2
c: 41/8
d: 23

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}