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Masteriza [31]
4 years ago
9

How can you write an equation in 2 variables to slove a problem

Mathematics
1 answer:
Dmitry_Shevchenko [17]4 years ago
7 0
You can write an equation in 2 variables to slove a problem by Solving <span> for y  using </span><span> The Method of Elimination: The process of substitution involves several steps: In a </span>two-variable<span> problem rewrite the </span>equations <span>so that when the </span>equations<span> are added, one of the </span>variables<span> is eliminated, and then </span>solve<span> for the remaining </span>variable<span>.</span>
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Will give brainliest Evaluate the expression using the order of operations and rules for signed numbers.
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Answer:

Given 6.8(6.7 – 7.2) – 2(4.6 + 1.2)

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Nataliya [291]

Answer:

a)This solution matches with the original equation and its solution

b)This solution matches with the original equation and its solution

c)This solution <em><u>does not</u></em> match with the original equation and its solution. Though the solution is correct the original given equation cannot be used.

d)This solution <em><u>does not</u></em> match with the original equation and its solution. Though the solution is correct the original given equation cannot be used.

Step-by-step explanation:

i) Which scenarios can be solved by 1.5x +  2.25 = 12.75. Select all that apply and note the given solution.

therefore 1.5x = 10.5   therefore x  = 7

a) let the number be x

   therefore if \frac{3}{2} x + \frac{9}{4}  = \frac{51}{4}  \Rightarrow  1.5x + 2.25 = 12.75  then the number x = 7.

 This solution matches with the original equation and its solution

b.) If a taxi driver charges a flat fee of $2.25 and $1.5 per mile, where the

     number of mile = x, then the number of miles Juan can ride the taxi for

     $12.75 is x = 7.

This solution matches with the original equation and its solution

c)if nine quarters of a number, say x, increased by three halves is fifty one

   quarters, the number is x = 5,

   \frac{9}{4} x + \frac{3}{2}  = \frac{51}{4}  \Rightarrow  9x = 51 - 6 = 45 \therefore x = 5

This solution <em><u>does not</u></em> match with the original equation and its solution. Though the solution is correct the original given equation cannot be used.

d.)   If a taxi driver charges a flat fee of $1.5 and $2.25 per mile, where the

     number of mile = x, then the number of miles Juan can ride the taxi for

     $12.75 is x = 5.

2.25x + 1.5  = 12.75  \Rightarrow  9x = 51 - 6 = 45 \therefore x = 5

This solution <em><u>does not</u></em> match with the original equation and its solution. Though the solution is correct the original given equation cannot be used.

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Y=<span><span>−5/8 which is the answer to the equation 
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