You and your friend are shopping for painting supplies. your friend wants five bottles of paint and one set of paint brushes. you want seven bottles of paint and two sets of paint brushes. each bottle of paint costs $3.69. if you and your friend’s total cost is $51.69, what is the cost of one set of paint brushes?

So your friend bought 1 set of brush and 5 bottles of paint
you bought 2 brushes and 7 bottles of paint
1 bottle=3.69
friends cost+your cost=51.69
total you bought 3 brushes and 12 bottles

each bottle is 3.69
12*3.69=44.28
totalcost=51.69=3brushes+12bottles

51.69=3brushes+44.28
minus 44.28 from both sides
7.41=3brushes
divide both sides by 3
2.47=1brush

1 set of paint brushes=$2.47

13=7.8514=3.5feet15=10.99feet16=2& 317=418=about 9ft19=7.8520=4in

step-by-step explanation:

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm