Paul wants to add the numbers (- 5.1) + 6.5. he also is adding 9 + (- 7). paul stated, "i know that both sums are negative, because whenever i add a negative number and a positive number, the sum is always negative." is paul's reasoning correct or incorrect? explain your answer in complete sentences in the box.

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

eight hundred an fifty one point four hundred and fifteen

800+50+1+.4+.01+.005