The computer accessory that Gracie is considering selling at her store comes in four colors white beige gray and black they’re three types of models that include optical mouse mechanical mouse and track bar how many combinations of colors and model machine stock in order to have at least one of every possible combination

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

320ft

step-by-step explanation:

120 divided by 3 equals 40

40 times 4=160

160 times 2=320