Math

I need the answers and the work shown steb by step today pls^^

For each direct variation find the constant of variation.Then find the value of y when x= -5

1.y=2 whne x=7
2.y=-2 when x=2
3.y= 17 when x=-4

y varies directly with x.

1.if y=6 when x=2,find x whn y=12
2.if y=7 when x= -3,find y when x= -1

  1. 👍 0
  2. 👎 0
  3. 👁 24
asked by alex
  1. If there is a direct variation, then y is proportional to x. This can be written y = kx. Use the information you are given to determine k.

    1. If y = kx and y=2 when x = 7, then
    2 = 7k, and
    k = 2/7, so
    y = (2/7)x

    Whe x = -5, y = -10/7

    Do the others the same way.

    1. If y=6 when x=2, then k=3 and y = 3x.
    When x=12, y = ?

    1. 👍 0
    2. 👎 0
    posted by drwls
  2. Well thanks but in the other questions im guessing that y stays the same so 1. will be equal to 1/2 and 2.-7/1 correct me if im wrong pls but is also suspicious because it says y varies direclty with x idk what that means

    1. 👍 0
    2. 👎 0
    posted by alex

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    An equation and the steps to solve it are shown below: 3x − one over two (8x − 2) = 4 Step 1: 3x − 4x + 1 = 4 Step 2: x + 1 = 4 Step 3: x + 1 − 1 = 4 − 1 Step 4: x = 3 Which step was the error made and why? Step 1,

    asked by oscar on September 4, 2015
  2. math

    An equation and the steps to solve it are shown below: 3x − one over two (8x − 2) = 4 Step 1: 3x − 4x + 1 = 4 Step 2: x + 1 = 4 Step 3: x + 1 − 1 = 4 − 1 Step 4: x = 3 Which step was the error made and why? Step 1,

    asked by oscar on September 4, 2015
  3. Algerba

    Solve for x. Round answers to the thousandths place. 3^x=17 5.667 2.579

    asked by Jass on March 28, 2017
  4. Physics

    An arrow is shot straight up from the edge of a cliff with an initial velocity of 50 ft/s. Answer the following questions using English units. The acceleration due to gravity has a magnitude of 32.2 ft/s. A. Find the time to reach

    asked by Maggie on August 22, 2016
  5. math

    i don't know how to work these problems out so i'll just pick a random one out from my home work and if someone could explain it to me step by step that would be very helpful. Solve the tragicomic expression for all answers

    asked by Kathryn on May 16, 2008
  6. Math

    Use multiplication, division, addition and subtraction and at least one set of parentheses to write an expression that simplifies to 7, 13, or 17. Do your work step by step and explain each step as you simplify the expression.

    asked by Mary on December 25, 2011
  7. Help needed- PreCalc

    Please help me understand how to solve this questions. I need step by step solution and answer because I find it difficult to understand when someone on here writes the answer instead of showing step by step work on how he/she got

    asked by chichi on August 4, 2016
  8. Math

    Use multiplication, division, addition and subtraction and at least one set of parentheses to write an expression that simplifies to 7, 13, or 17. Do your work step by step and explain each step as you simplify the expression.

    asked by Denise on March 15, 2013
  9. Algebra worksheet

    Hello. My algebra teacher gave me this worksheet last week and everyone had to bring it yesterday and I haven't done it yet. Can someone please help me. He said Friday is the last day or he's going to take away some points. I've

    asked by 9thgradestudent on December 9, 2015
  10. english

    I have to find out the direct object pronoun and then replace the direct object with a direct pronoun. Please check my answers. 1.My friend sells his new car. (car is the direct object, and I replace car with im not sure. 2. My

    asked by Dan on March 31, 2016

More Similar Questions