Finding the rate of a tax or commission The sales tax for an item was $11.70 and it cost $390 before tax.
Find the sales tax rate. Write your answer as a percentage.
1%
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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.

i need more info. are you looked to see there mph? how much they deliver? how far they go?

step-by-step explanation:

good luck on your studies! : )

david edward.