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Juli2301 [7.4K]
3 years ago
6

Determine which of the ordered pair is a solution for the equation 2x-3y=7

Mathematics
1 answer:
Vikentia [17]3 years ago
7 0
<h3><u>The correct answer is: B.</u></h3>

We could use a graphing calculator to solve this easily, but let's just solve it by looking at the equation.

We'll need to turn this standard form equation into a slope-intercept form equation to be able to easily solve it.

Isolate y.

2x - 3y = 7

<em><u>Add 3y to both sides.</u></em>

2x = 3y + 7

<em><u>Subtract 7 from both sides.</u></em>

3y = 2x - 7

<em><u>Divide both sides by 3.</u></em>

y = 2/3x -7/3

Now, we can plug each x value in the answer choices into x to find the corresponding y value.

y = 2/3(7) - 7/3 = 2.34

As this y value does not match, A is not the answer.

y = 2/3(-4) - 7/3 = -5

This y value does match, so B is the correct answer.

y = 2/3(-9) - 7/3 = -8.34

This y value doesn't match either, so C is not the answer.

y = 2/3(9) - 7/3 = 3.67

This y value doesn't match either, so D is not the answer.

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