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April 25, 2014

Homework Help: Precalculus check answers help!

Posted by Kelsey on Wednesday, May 30, 2012 at 12:43am.

7.) Write the equation 3x + 4y – 7 = 0 in normal form.

3/5x + 4/5y + 7/5 = 0
-3/5x - 4/5y - 7/5 = 0
-3/5x - 4/5y + 7/5 = 0 ~
3/5x + 4/5y - 7/5 = 0

8.)Write the standard form of the equation of a line for which the length of the normal is 4 and the normal makes an angle of 45° with the positive x–axis.

sqrt2x + sqrt2y +8 = 0
2x + 2y – 8 = 0
sqrt2x + sqrt2y -8 = 0 ~
2x + 2y + 8 = 0

9.) Write the standard form of the equation of a line for which the length of the normal is 3 and the normal makes an angle of 135° with the positive x–axis.
sqrt2^x – sqrt2y + 6 = 0 ~
sqrt2^x + sqrt2y - 6 = 0
sqrt2^x – sqrt2y - 6 = 0
sqrt2^x + sqrt2y + 6 = 0

10.) Find the distance between P (–2, 1) and the line with equation x – 2y + 4 = 0.

4sqrt5/5
0 ~
-4sqrt5/5
5/4

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