anonymous
  • anonymous
Select the equations that are parallel and perpendicular to y = -3x - 1 and that pass through the point (3, 1).
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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anonymous
  • anonymous
y = mx + b m is slope y = -3x - 1 -3 is slope Parallel lines have the same slope. Slope of Perpendicular lines is the opposite reciprocal...change to the opposite sign and find the reciprocal. ex: -2 to 1/2
anonymous
  • anonymous
So what is the slope of the parallel line?

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anonymous
  • anonymous
the slope is -3
anonymous
  • anonymous
Is that right? @jazy
anonymous
  • anonymous
Oh. okay. positive 1? Since I had to change it
anonymous
  • anonymous
The opposite reciprocal of -3 would be a positive 1/3. You switch signs(from - to +). 3 is the same as 3/1...and you find the reciprocal, which is 1/3. ------------------------------- Lets find the equation for the parallel line first. You have a slope of 3 and the given point is (3, 1).
anonymous
  • anonymous
Do you understand how the "opposite-reciprocal" thing works?
anonymous
  • anonymous
Yes, I do know. Just was a little confused at the start
anonymous
  • anonymous
Ok (: So are you familiar with Point-Slope form?
anonymous
  • anonymous
yes, fairly. Need a little help on that .
anonymous
  • anonymous
so what's the next step?
anonymous
  • anonymous
Yes :)
anonymous
  • anonymous
Alrighty I don't see that for the answer though :/
anonymous
  • anonymous
Why'd it delete?! y - y1 = m(x - x1) m is slope x1 and y1 are the values of the point, (x, y) (3, 1) Slope is -3. y - 1 = -3(x - 3)
anonymous
  • anonymous
Weird. yeah it deleted
anonymous
  • anonymous
Strange :/ Okay, so we have to change that^ into Slope-Intercept form. Distribute the -3. Solve for y. y - 1 = -3(x - 3) y - 1 = -3x + 9 Add 1 to both sides. y = -3x + 10 ^There is the equation for the parallel line.
anonymous
  • anonymous
I see the answer now :P
anonymous
  • anonymous
Yea, so you don't really have to go through finding the perpendicular line. (;
anonymous
  • anonymous
True! Can you help me on one last thing?
anonymous
  • anonymous
Sure!
anonymous
  • anonymous
Vivian combined different amounts of white paint, blue paint, and green paint to make 145 milliliters (ml) of paint of a new shade. The amount of white paint was x ml. The amount of blue paint was 10 ml less than twice the amount of white paint, and the amount of green paint was half the amount of blue paint. This is represented in the equation below. x + (2x – 10) + 1/2 (2x – 10) = 145 What was the difference in the amounts of white paint and blue paint Vivian combined? 30 ml 35 ml 40 ml 45 ml
anonymous
  • anonymous
nevermind I got it!
anonymous
  • anonymous
(:
anonymous
  • anonymous
PASSED MY EXAM!

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