Question

You buy 3 bags of sand and 2 bags of pea gravel for $21. In a second purchase (at the same prices), you buy 2 bags of sand for $10. Let represent the price (in dollars) per bag of sand and let y represent the price (in dollars) per bag of pea gravel. Use a graph to find the price per bag of sand and the price per bag of pea gravel. What is thE bag of sand cost and bad of pea gravel cost.

Answer 1

Bag of sand cost = $5/-

Bag of pea gravel cost = $3/-

Explanation:

Given that,

3 bags of sand and 2 bags of pea gravel cost $21

2 bags of sand cost $10.

Suppose number of bags of sand is represented by x.

Number of bags of pea gravels is represented by y.

We can write as:

3x + 2y = 21

2x = 10

x = 5

eq 1 : 15+ 2y = 21

y= 3

Therefore,

Bag of sand cost = $5/-

Bag of pea gravel cost = $3/-