An airplane 28,000 feet above ground begins descending at a constant rate of 2,000 feet per minute. which equation gives the height, h, of the airplane after m minutes?

so it's 28000 feet above ground, to start with, then every passing minute "m" is dropping by 2000 feet, let's see,

1 minute28000 - 2000(1)

2 minutes28000 - 2000(2)

3 minutes28000 - 2000(3)

4 minutes28000 - 2000(4)

m minutes28000 - 2000(m)

h = 28000 - 2000m.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it