Anyone know the answer to this ?

10.4

Step-by-step explanation:

(10x - 4)/5 = 20

(10x - 4) = 20 * 5

10x - 4 = 100

10x = 104

x = 104/10

x = 10.4

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20

step-by-step explanation:

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.