In how many ways can seven airplanes line up for a departure on a runway if the plane with greatest number of passengers must depart first?

Lcm of 14, 21 and 28

if the length of a rectangle is increased by 30% and the width of the same rectangle is decreased by 30% what is the effect on the area of the rectangle? It is increased by 60% it is unchanged it is decreased by 15% it is decreased by 9%

Sela put 6 times as many coins now as she had 4 months ago. if sela has 240 coins now, how many did she have 4 months ago

Alex container of cranberry juice holds 200 milliters. harrys container holds 7/8 as much juice. how many milliliters of cranberry juice does harrys container hold?

What is 20% written as a decimal

Fine the length of the hypotenuse of a Right triangle with legs pf 20cm and21cm

One nanometer is about 0.00000003937 of an inch. what is this number in scientific notation?

How to graph 200-25x=y

Simplify 11-4 (0.2) + 2

What is a1 of the arithmetic sequence for which a3=126 and a64=3,725