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lauryngrace37
26.01.2020 •
Mathematics
Find an equation of the line passing through the point ( 6 , − 4 ) (6,-4) and perpendicular to 9 x − 3 y = 9 9x-3y=9 . write your answer in slope-intercept form.
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Ответ:
Step-by-step explanation:
We are given;
A point (6, -4)An equation of a line, 9x - 3y = 9We are required to determine the equation a line passing through a point (6, -4) and perpendicular to the given line;
To answer the question we need to get the gradient of the given line first.We write the equation 9x - 3y = 9 in the form of y = mx + c, where m is the slope;That is;y = 3x -3
Thus, the slope of the line is 3But; m₁ × m₂ = -1 (For perpendicular lines)
Therefore;
m₂ = -1 ÷ 3
= -1/3
Therefore, the slope of the line in question is -1/3 and the line passes through (6, -4).
To get its equation, we get another point (x, y)
Then;
Thus;
In the form of slope-intercept, the equation will be;
Thus, the equation of the line is;
Ответ:
Unitary pencil cost= $2.06
Step-by-step explanation:
Giving the following information:
Total cost= $22.35
Pad cost= $9.99
Number of pencils= 6
First, we need to calculate the total cost spend on pencils.
Total pencils cost= total cost - pad cost
Total pencils cost= 22.35 - 9.99
Total pencils cost= $12.36
Now, the cost of each pencil:
Unitary pencil cost= 12.36/6
Unitary pencil cost= $2.06