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2 years ago

If 2 cubic feet of sand weigh 90 pounds, how much do 5 cubic feet of sand weigh? what is the actual answer

Mathematics

2 answers:

sammy [17]2 years ago

8 0

Answer:

225 pounds

Step-by-step explanation:

One cubic feet of sand is 45 pounds so 5 cubic feet of sand is 225 pounds.

nasty-shy [4]2 years ago

5 0

Answer:

175

Step-by-step explanation:

It is much easier if you use the unit rate, so we'll convert the first senta\ence into a ratio. 2 cubic feet:90lb. you need to get 1 cubic foot, so divide both sides my 2, 1 cubic foot:35 pounds. now, to get five cubic pounds(See where this is going?) you multiply both sides by 5. 5 cubic feet:175lb

(these idoits make you go back and forth in solving problems)

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A farmer owns pigs, chickens, and ducks. When all her animals are together, she has 30 feathered animals, and the animals all to

tatiyna

To solve this problem, let us first assign some variables. Let us say that:

x = pigs

y = chickens

z = ducks

From the problem statement, we can formulate the following equations:

1. y + z = 30 ---> only chicken and ducks have feathers

2. 4 x + 2 y + 2 z = 120 ---> pig has 4 feet, while chicken and duck has 2 each

3. 2 x + 2 y + 2 z = 90 ---> each animal has 2 eyes only

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4 x + 2 (30 – z) + 2 z = 120

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