When ringing up a customer, a cashier needs 6 seconds to process payment as well as 1 second to scan each item being purchased. If it takes 38 seconds to ring up a customer,
how many items are being purchased?

sorry, i don't know i just need points, i'm new here. chao

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.