Abby paid $65 for a computer back-up system
and $17 for a cable. She
paid $100 in cash. How
much change should she
get back?

$18

Step-by-step explanation:

$65 + $17 is 82 so then she paid $100 so then I would subtract $100 and $82 which is $18 so she will receive $18 back. Hope this helps.  

$18

Step-by-step explanation:

65 + 17 = 82

100 - 82 = 18

Doubls check:

82 + 18= 100

Final

She would get $18 back for change.

step-by-step explanation:

let's assume

number of candles set =x

price of of x candles =p(x)

we are given

a candle maker prices one set of scented candles at $10 and sells an average of 200 sets each week

so, we get point as (200,10)

he finds that when he reduces the price by $1, he then sells 50 more candle sets each week

so, we can find slope

now, we can use point slope form of line

now, we can plug values

we can use point

and find b

now, we can plug it back

and we get

now, we can find revenue

we know that

revenue = price*quantity

so, we get