A box contains red green and blue marbles. There are 600 marbles in the box. The ratio of red to green to blue marbles is 3:5:7, how many are there of each color?

Step-by-step explanation:

Give the ratio of red to green to blue marbles to be 3:5:7

Total ratio = 3+5+7 = 15

Total marbles = 600marbles

Amount of red = ratio of red/total ratio × 600

Amount of red marbles = 3/15 × 600

Amount of red marbles = 3×40 = 120marbles

Amount of green marbles = 5/15×600

Amount of green marbles = 5×40 = 200marbles

Amount of blue marbles = 7/15×600

Amount of blue marbles = 7×40 = 280marbles

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

ou would have 12 of each