math
posted by Anonymous .
a fifth grade class sold 25 liters of orange juice the orange juice was sold in cups containing 200 millilters and 300 milliliters an equal number of cups contaning 200 milliliters and 300 millilters were sold how many cups of orange juice did the class sell

number of 200 ml cups  x
number of 300 ml cups  x (it said their number was equal)
200x + 300x = 25000
500x = 25000
x = 50
So they used 50 cups of each
check:
50(200) = 10000 ml
50(300) = 15000 ml for a total of 25000 ml or 25 litres 
5000000

100

Mikhail used 220 inches of wire to make this figure. The figure is made up of two identical triangles, a 15 inch by 12 inch rectangle and a square of side 19 inches. What is the length of one side of each triangle if all the sides of the triangles are equal in length?

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