Decrease
489.8
by 82%

88.164

Step-by-step explanation:

First you find 82 percent of 489.8 and to do the we do

489.8 times .82

which equals 401.636

now we decrease 489.8 by 401.636

489.8 minus 401.636 equals

88.164

i think it's 88.164

Step-by-step explanation:

if im wrong plz forgive me

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.