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3 years ago

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Please help

1 answer:

Anni [7]3 years ago

8 0

Answer:

Standard form: 7x + 5y = −35 where <em>A</em> = 7, <em>B</em> = 5, and <em>C</em> = -35.

Step-by-step explanation:

The standard form, Ax + By = C, where A, B, C are constants (must be integers) and A is positive. In order to turn the constant A in your original equation into a positive integer, we can multiply both sides of the equation by -1:

(−1) (−7x − 5y) = 35 (−1)

Then, you'll have the following standard form:

7x + 5y = −35 where <em>A</em> = 7, <em>B</em> = 5, and <em>C</em> = -35.

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3 years ago

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Answer:

Walnuts cost $1.75, chocolate chips cost $2.75

Step-by-step explanation:

<h3>Let the costs be:</h3>

Walnuts - x
Chocolate chips - y

<h3>Set equations as per question</h3>

For 7 pounds of walnuts and 9 pounds of chocolate chips, the total cost is $37:

7x + 9y = 37

For 5 pounds of walnuts and 3 pounds of chocolate chips, the total cost is $17:

5x + 3y = 17

<h3>Solve the system by elimination</h3>

Multiply the second equation by 3 and subtract the first equation, solve for x:

3(5x + 3y) - (7x + 9y) = 3(17) - 37
15x + 9y - 7x - 9y = 51 - 37
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Find the value of y:

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