Rebecca gave the cashier $20 to pay for 3 tickets to a museum. The cashier gave her back $1.28 back in change. Each ticket cost the same amount. How much did each ticket cost?

6.24

Step-by-step explanation:

Take 20 and subtract 1.28. That gives you 18.72 which is how much it cost for all 3 tickets. Then divide the 18.72 by 3 and you get 6.24. So it costs 6.24 for each ticket. Hope that helps.

x

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.