Which equation best expresses the revenue for selling n books at $12.50 each?

A) r+n=12.5

B) r=n+12.5

C) r=12.5/n

D) r=12.5n

A square has one side increased in length by two inches

A survey of the 12th grade students at Gaffigan High School found that 84% of the seniors have their driver's licenses, 16% of seniors take the bus every day to school, and 14% of the seniors have driver's licenses and take the bus to school every

A quaderlateral has the following angle measurements : 100,90,45, and?

Write the equation of the circle with a center at (-7,4) and a diameter of 18 A) (x + 7) 2 + (y - 4) 2 = 18 B) (x - 7) 2 + (y + 4) 2 = 324 C) (x + 7) 2 + (y - 4) 2 = 324 D) (x + 7) 2 + (y - 4) 2 = 81 E) (x - 7) 2 + (y + 4) 2 = 81

What is the first step in solving the quadratic equation x^2-40=0 A. taking the square root of both side of the equation B. adding 40 to both sides of the equation C. squaring both sides of the equation D.

If a octagon is 25 centimeters long then the perimeter of the octagon is how many meters

In parallelogram ARMY, angle A equals (3x+10) ° and angle Y equals (2x+15.5) ° what is X?

A box contains 2 white, 3 red, and 4 black marbles. you choose two marbles and each are chosen at random. find the probability that both marbles are black

More precise 2.8 mm or 3.79 mm

How do you write 50 percent as a fraction in simplest form?