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Instructions: Find the equation of the line through the point [tex]\((10,4)\)[/tex] and parallel to [tex]\(3x + 5y = 8\)[/tex]. Use a slash ("/") for fractions (e.g., [tex]\(1/2\)[/tex] for [tex]\(\frac{1}{2}\)[/tex]). Do not include spaces in your answer.

[tex]\(y = -3/5x + 10/5\)[/tex]


Sagot :

To find the equation of the line passing through the point [tex]\((10, 4)\)[/tex] and parallel to the line given by [tex]\(3x + 5y = 8\)[/tex], we'll follow these steps:

### Step 1: Determine the slope of the given line.

The provided line's equation is [tex]\(3x + 5y = 8\)[/tex]. To find the slope, convert this equation into the slope-intercept form, which is [tex]\(y = mx + b\)[/tex], where [tex]\(m\)[/tex] represents the slope.

Starting with the equation:
[tex]\[ 3x + 5y = 8 \][/tex]

Solve for [tex]\(y\)[/tex]:
[tex]\[ 5y = -3x + 8 \][/tex]
[tex]\[ y = \left(-\frac{3}{5}\right)x + \frac{8}{5} \][/tex]

From this, we see the slope [tex]\(m\)[/tex] is:
[tex]\[ m = -\frac{3}{5} \][/tex]

### Step 2: Utilize the point-slope form of the line equation.

Since we know the slope of the line parallel to [tex]\(3x + 5y = 8\)[/tex] is the same ([tex]\(-\frac{3}{5}\)[/tex]), and the line must pass through the point [tex]\((10, 4)\)[/tex], we use the point-slope form of the equation:
[tex]\[ y - y_1 = m(x - x_1) \][/tex]

Plugging in the point [tex]\((10, 4)\)[/tex] and the slope [tex]\(-\frac{3}{5}\)[/tex]:
[tex]\[ y - 4 = -\frac{3}{5}(x - 10) \][/tex]

### Step 3: Simplify the equation to the slope-intercept form.

Distribute the slope on the right-hand side:
[tex]\[ y - 4 = -\frac{3}{5}x + \frac{30}{5} \][/tex]
[tex]\[ y - 4 = -\frac{3}{5}x + 6 \][/tex]

Add 4 to both sides to isolate [tex]\(y\)[/tex]:
[tex]\[ y = -\frac{3}{5}x + 6 + 4 \][/tex]
[tex]\[ y = -\frac{3}{5}x + 10 \][/tex]

Thus, the equation of the line through point [tex]\((10, 4)\)[/tex] and parallel to the given line [tex]\(3x + 5y = 8\)[/tex] is:
[tex]\[ y = -\frac{3}{5}x + 10 \][/tex]

In terms of entering your answer:
[tex]\[ y = -3/5x + 10 \][/tex]
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