It takes Mr. Been 90 seconds to walk up an escalator when it is not moving. It takes Mr. Been 60 seconds to go up, just standing when the same escalator is moving. How many seconds does it take Mr. Been to walk up the moving escalator?

Emily meal cost 32.75 and Darren's meal cost 39.88. Emily treats Darren by paying for both meals, and leaves 14% tip. Find the total cost

Which number is larger? -20 or - 15

Find the derivative of the function using the definition of derivative. f (x) = 1 5 x - 1 6

Addison buys 5 neon tetras and 4 cardinal tetras for $15.50. Caden buys 6 neon tetras and 10 cardinal tetras for $26.40. Write a system of equations that can be used to find n, the cost of 1 neon tetra, and c, the cost of 1 cardinal tetra.

Solve for x in the equation x squared minus 14 x + 31 = 63. x = - 16 or x = 2 x = negative 7 plus-or-minus 3 StartRoot 7 EndRoot x = - 2 or x = 16 x = 7 plus-or-minus 3 StartRoot 7 EndRoot

You and a friend sell hats at a fair booth. You sell 16 hats on the first shift and 21 hats on the third shift. Your friend sells x hats on the second shift. Write an expression for the number of hats sold.

How many milliliters of water equals one gallon?

Percents are the result of expressing numbers as a part of?

UR Probability of independent events Amal A number cube is rolled and a coin is tossed. The number cube and the coin are fair.

6x+1/2y=3 into slope intercept form