Math

I need help with two problems. Just want to make sure that the answers I put are correct.

1) Which of the following is an equation of a vertical line?
F. 4x + 5y = 0
G. -4 = 16x
H. 3y = -9
I. 4x + 5y = -1

2) Which equation is the equation of a line that passes through (-10, 3) and is perpendicular to y = 5x - 7?
A. y = 5x + 53
B. y = - 1/5x - 7
C. y = - 1/5x + 1
D. y = 1/5x + 5

It would also be greatly appreciated if you told me how you got your answer. Thanks! :)

  1. 0
  2. 0
  3. 28
asked by Melanie
  1. Hints:
    1. The equation of a vertical line has the y-term absent, since it is not possible to calculate y for a given x.

    2. The slope of L: y=5x-7 has a slope of 5.
    The slope of a line perpendicular to L has a slope m such that 5*m=-1, or m=-1/5.
    Also, if the line L1 passes through the point P(-10,3), then by substituting x=-10 and solving for y, we should get y=3.

    Post your answers for confirmation if you wish.

    1. 0
    2. 0
    posted by MathMate
  2. For 1, I got G and for the second one I got B. are they correct?

    1. 0
    2. 0
    posted by Melanie
  3. G is correct for 1.

    For 2,
    if I substitute -10 in y = - 1/5x - 7 ,
    I get y=(-1/5)*(-10)-7=2-7=-5, we're looking for 3.
    Give it another try. You're close.

    1. 0
    2. 0
    posted by MathMate
  4. Ummm is it C?

    1. 0
    2. 0
    posted by Melanie
  5. You do not seem very sure about it. Can you demonstrate why it is, or it is not C?

    1. 0
    2. 0
    posted by MathMate
  6. I'm sure about it now :) Thank you for your help. I know it is C because once I put in the x and y axis into the equation, I multiplied 1/5 with -10 then added one and the result was three that's how I knew it was C :)

    1. 0
    2. 0
    posted by Melanie

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    I have no idea where to start! *A quick quiz consists of 3 multiple choice problems, each of which has 4 answers, only one of which is correct. If you make random guesses on all 3 problems, (a) What is the probability that all 3

    asked by Emily on August 16, 2009
  2. Physics

    If an object is hung from a cable with a weight of 40 N, what is the tension in the two cables? I got some answers, but it would be best if I knew if I was doing the problems correctly before I do the rest of the worksheet. I did

    asked by Katie on December 3, 2009
  3. Social studies

    I don't want links I want answers please and please make sure it's in your own words. What are the causes of problems the Mayans and other Native American groups fate in Guatemala? How are people trying to solve these problems?

    asked by FluttershyK22 on May 6, 2016
  4. Easy (yet confusing) Algebra

    These problems are pretty easy, but confusing (as stated in the subject line). |2x+5|-x=10 |3x+4|-2x=11 I know there are supposed to be two answers for each problem, for the first problem I got 5 and for the second problem I got

    asked by Emily on April 11, 2007
  5. English

    Help:Please change show me anthing that I need to do, by placing the correct form at the it the bottom of the essay. Topic: What is your biggest regret in life? My Biggest Regret Everyone has had some regrets about something in

    asked by Angel on November 12, 2009
  6. English

    Can you make my answers sound more better by changing few words? and do my answers make sense? 1. What does a learner do? learner learns about variety of different things and became more knowledgeable. 2. what does a communicator

    asked by Lola Styles on September 5, 2012
  7. algebra

    I have a few math questions I made them just like my actual problems so that I can go through the steps you have went through to answer my own problems...Again THESE ARE NOT THE REAL PROBLEMS JUST EXAMPLES LIKE MINE WITH DIFFERENT

    asked by Anonymous on June 12, 2013
  8. Physics (Gravitation)

    In Fig. 13-25, three particles are fixed in place. The mass of B is greater than the mass of C. Can a fourth particle (particle D) be placed somewhere so that the net gravitational force on particle A from particles B, C, and D is

    asked by M on March 29, 2012
  9. Life Science

    Im doing 7th grade life science. (im 13.) I need to make sure my answers are right because my homework is being graded. I think i have most of them right but we'll see. I DO NOT want you to tell me the answer to my homework. I

    asked by Holley on September 14, 2013
  10. Math/Fractions

    I really need help with this problem. I have NO IDEA how to get the answers to 3 and 5. Benjamin and Olivia are putting in a new floor in thier kitchen. To get the floor up to the desired height, they need to add 1 1/8 ft. of

    asked by Mary Mac on May 2, 2008

More Similar Questions