The price of a box of 15 cloud markers is $12.70. the price of a box of 42 cloud markers is $31.60. all prices are without tax, and the price of the packaging is the same for any size. how much would 50 cloud markers in a box cost? write an equation which will tell the price p for the number n markers in the box.

P = 0.7N + 2.20

50 markers cost $37.20

Step-by-step explanation:

We know a box of 15 costs $12.70 and a box of 42 costs $31.60. Since the price of packaging is the same no matter the size, the price will go up at a constant rate. To find this rate, subtract the price 31.60-12.70 = 18.90 Divide it by the difference in number of markers in a box 42-15 = 27. So 18.9/27 = 0.7. This means for every marker added the price increases by $0.70. This is a linear relationship. Use the point slope form to write the equation.

Here y is price P and x is N for number of markers.

P = 0.7N+2.20

To find the price for 50 markers, substitute N=50.

P = 0.7(50)+2.20

P= 37.20

step-by-step explanation:

it's 15

529 and 531

step-by-step explanation: