Mary's age is twice the sum of John's age and 3. The sum of both ages is 21 years. Find the age of each one.

Real World Example Functions. Smart phone sales since 1990 A. Linear B. Quadratic C. Exponential Half life of a pesticide A. Linear B. Quadratic C. Exponential

Justify each step of the proof. Conjecture: If 2 (x^2+5) = 60, then x is 5 or - 5

In one baseball season peter hit twice the difference of the number of home runs alice hit and 6 altogether they hit 18 home runs how many homeruns did each player hit that season?

Write the fraction as a percent: 11/50. (Simplify your Answer.)

You have 18 stamps from Mexico in your stamp collection. These stamps represent 3/8 of your collection. The rest of the stamps are from the United States. How many stamps are from the United States?

Trey is estimating the length of a room in his house. The actual length of the room is 17 m. Trey's estimate is 15 m. Find the absolute error and the percent error of Trey's estimate. If necessary, round your answers to the nearest tenth.

Which ordered pair is a solution of the equation y = 4x? (1, 3) (-1, - 4) (-4, - 1) (1, - 4)

A bowl contains 3 red, 8 blue, and 7 black beads. Margaret randomly selects 3 beads one after the other without replacement. Find the probability of getting a red, blue, and black bead, in that order.

Solve for x 7/x+9=21/36

What is the y-intercept of f (x) = 11