The answer is the first choice
Answer:
60
Step-by-step explanation:
You take the discount first. Alex is completely right. Laura is if and only if that 110% is really just 10%. So I'll use Alex's method because it is for certain correct.
28.5*35/100 = 9.975 (which is the amount of the discount)
28.5 - 9.975 = 18.525 (which is the amount paid with the discount factored in.)
Now you take 10% of this amount and add it on which gives 18.525 * 10/100=1.825 which is the amount of the tax.
Add this on to the selling price 18.525 + 1.825 = 20.3775 and now is the time to do your rounding.
The cash register will ring up 20.38 which is just under $21.00
Answer: $20.38
Answer:

Step-by-step explanation:
let's make the other number x and add it with -4-5i, equate to 5+6i

add 4 and 5i to both sides to get x on its own:

collect like terms. This is the other number.

Answer:
12 customisations.
Step-by-step explanation:
P = 3.50C + 25 where P = total payment and C = the number of customisations.
So if they paid $67:
67 = 3.50C + 25
3.50C = 67 - 25 = 42
C = 42/3.50
C = 12.