A plane traveling from Dallas to New York with a tailwind of 30 miles per hour takes 4.5 hours. Returning with the headwind, it takes the same plane 5 hours. What is the average speed of the plane in calm conditions?

An underground mine elevator descends 12% of the total depth every minute. The total depth of the elevator is 75 meters below the ground. How many meters below the ground is the elevator after 2 minutes? A: - 18 meters B: - 9 meters C: - 4.

The graph of f (t) = 3 • 2^t shows the value of a rare coin in year t. What is the meaning of the y-intercept? A. When it was purchased (year 0), the coin was worth $3. B. In year 1, the coin was worth $6. C.

The equation y = m x + b is the slope-intercept form of the equation of a line. What is the equation solved for b?

Use the remainder theorem to find the remainder: (x3 - 1) : (x - 4). 64 63 - 65 - 64

Evaluate the integral (xe^2x) / (1+2x) ^2

Tierra rode in a bike-a-thon. Her sponsors donated $7 for every 5 miles she biked. At the end of the bike-a-thon, Tierra had raised $147. How many miles did she ride?

To which subset of real numbers does - 18 not belong?

The table shows values for functions f (x) and g (x) x f (x) = 4x+1 g (x) = 3x+1-4 -3 - 11 - 359 -2 - 7 - 113 -1 - 3 - 3 0 1 - 1 1 5 5 2 9 23 3 13 77 What is the solution to f (x) = g (x) ? Select each correct answer. -3 -2 -1 0 1 2 3

Which values of x are solutions to the equation below 15x^2-56=88+6x^2

4.80 rounded to the nearest ten dollars