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yarga [219]
2 years ago
7

A supplier sells 2 1/4 pounds of mulch for every 1 1/3 pounds of gravel. The supplier sells 1/72 pounds of mulch and gravel comb

ined. How many pounds of each item does the supplier sell?
Mathematics
1 answer:
Georgia [21]2 years ago
3 0

Answer:

108 pounds of mulch.

64 pounds of gravel.

Step-by-step explanation:

Let x be the amount of mulch sold and y be the amount of gravel sold.

We have been given that a supplier sells 2 1/4 pounds of mulch for every 1 1/3 pounds of gravel.  

2\frac{1}{4}=\frac{9}{4}

1\frac{1}{3}=\frac{4}{3}

We can represent this information as:

\frac{x}{y}=\frac{\frac{9}{4}}{\frac{4}{3}}...(1)

We are also told that the supplier sells 172 pounds of mulch and gravel combined. We can represent this information as:

x+y=172...(2)

From equation (1) we will get,

\frac{x}{y}=\frac{9}{4}*\frac{3}{4}

\frac{x}{y}=\frac{27}{16}

x=y*\frac{27}{16}

Substituting this value in equation (2) we will get,

y*\frac{27}{16}+y=172

Now let us have a common denominator.

\frac{27y}{16}+\frac{16y}{16}=172

\frac{27y+16y}{16}=172

16*\frac{43y}{16}=16*172

43y=2752

y=\frac{2752}{43}

y=64  

Therefore, the supplier sold 64 pounds of gravel.

Upon substituting y=64 in equation (2) we will get,

x+64=172

x=172-64

x=108

Therefore, the supplier sold 108 pounds of mulch.    



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