Which function has an inverse that is a function?

b (x) = x + 3

d (x) = - 9

m (x) = - 7x

P (x) = x

There are 39 pens in 3 boxes. How many pens are in 12 boxes?

10 squared take away four cubed

Jenny catches a taxi from the supermarket to her house. The taxi firm charges £3.00 standing charge, plus 50p per mile. How much will it cost Jenny to travel 8 miles?

a museum's gift shop had 280 animal shaped erasers. Each package had 8 erasers. how many packages are there

The resort is getting ready for ski season. The tile flooring around the fireplace needs to be replaced. The area is a rectangle 15.25 feet long and 10.3 feet wide. The construction manager estimates he will need 160 square feet of tile flooring.

The sum of two number is 19, and their difference is 1. Let x be the larger number and y be the smaller number. Write the first equation

The table gives the populations of three countries in 2013. United States 3.16 x 108 Brazil Germany 1.96 * 108 8.0 x 107 Arrange the sums and differences in increasing order of their values.

A cab charges $1.79 for the flat fee and $.25 for each mile right and solve an inequality to determine how many miles and you can travel if you had to spend $15

Which of the following correctly gives P in terms of E, O, and M

Which is equivalent to 3x/x+5 - x-5/x A: x^2+25/x (x+5) B: 2x^2+25/x (x+5) C: 2 (x+5) / x (x+5) D: 2 (x-5) / x (x+5)