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liberstina [14]
2 years ago
11

Elisa bought some boxes of pencils for $3.99 each and some boxes of pens at $4.99 each. If p represents the number of boxes of p

encils and b represents the number of boxes of pens, which equation describes the relationship between these two variables if she spent a total of $39.91 on these items?
A. 4.99p + 3.99b = 39.91
B. 4.99p - 3.99b = 39.91
C. 3.99p + 4.99b = 39.91
D. 3.99p - 4.99b = 39.91
Mathematics
1 answer:
vladimir2022 [97]2 years ago
8 0

The equation which describes the relationship between these two variables is 39.91 = 3.99p + 4.99b

Given:

<em>Cost of each box of pencil</em> = $3.99

<em>Cost of each box of pen </em>= $4.99

<em>Total cost</em> = $39.91

let

p = <em>number of boxes of pencils</em>

b = <em>number of boxes of pens</em>

The equation:

<em>Total cost = (Cost of each box of pencil × number of boxes of pencils) + (Cost of each box of pen × number of boxes of pens)</em>

39.91 = (3.99 × p) + (4.99 × b)

39.91 = 3.99p + 4.99b

Therefore, equation which describes the relationship between these two variables is 39.91 = 3.99p + 4.99b

Read more:

brainly.com/question/8957185

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Step-by-step explanation:

Given system of equation are

y=2x \hfill (1)

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To find the solution of the given system of equations

To Check that (2,4) is a solution to this system or not

Solving equations (1) and (2)

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Step-by-step explanation:

From given information it seems , we need to determine number of bricks and number of blocks.

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⇒  number of bricks + number of blocks = 28

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Given that cost of 1 brick = $0.38  and cost of 1 block =$1.56

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