How many unknowns does a system of equations have

A taxi driver charges a fixed of r to a passenger. In addition, the taxi driver charges a rate of m for each mile driven. Write a formula to represent The total amount this taxi driver will charge for a trip of n miles

True or False? Is the function f (x) = (2x - 7) ^2 a one-to-one function? Select one: True False

If u saved 20% on a shirt. The amount saved was $6 what was the original price?

The quantity y varies directly as x and inversely as z. when x is 10 and z is 4, y is 15. what is y when x is 20 and z is 6? 1) 6 2) 20 3) 27 4) 30

If the slope of a straight line is 0 and the y-intercept is - 2, what is the equation of the line? A. y = - 2 B. y = x - 2 C. y = 2x D. y = 2

A calculator has 50 keys in five colors:gray, black, blue, yellow, and green. There are 6 gray keys for every 7 blue keys. write the possible ratios for gray to blue keys

A box contains 19 large marbles and 11 small marbles. Each marble is either green or white. 6 of the large marbles are green, and 5 of the small marbles are white.

What is 63 in lowest terms

A rabbit can run short distances at a rate of 35 miles per hour. A fox can run short distances at a rate of 21 miles per half an hour. Which animal is faster, and how much

Karen has 4h storybooks. Karen's storybook collection is 2/3 of what Mary's collection is. How many storybooks do they have in all,