Post a New Question

algebra

posted by .

20 - 4/5x greater than or equal to 16. I did this and got the answer x greater than or equal to -5 but the correct answer is said to be x is less than or equal to 5. i am not sure what i did wrong. thanks

  • algebra -

    20 - (4/5)x ≥ 16 ??
    -(4/5)x ≥ -4 now multiply both sides by -1 and change direction of arrow
    (4/5) x ≤ 4
    x ≤ 5

  • algebra -

    I will first assume the second term is 4x/5 and not 4/(5x)

    If 20 - 4x/5 >or= 16
    -4x/5 >or= -4
    -4x >or= 20
    Now here is where you probably went wrong: When you multiply or divide both sides of an inequality by a negative number, you must change the direction of the > or < sign.
    Divide by -4 and you get
    x <or= 5

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra--Correction?

    Solve x^2 -3x is greater than or equal to 10 Would the solutions be x=5 and x= -2?
  2. math

    9x+5greater than or equal to -40 or 7x+3greater than or equal to -11 solve and graph I got the answer of x greater than or equal -5 or x is greater than or equal to -2 as the solution to this equations, but how do i put this into a …
  3. linear programming

    For the linear program Max 2A + 7B s.t. A + B greater than or equal to 12 2A + 2 B less than or equal too 26 B greater than or equal to 1 A, B greater than or equal to Which of the following would be found in the correct standard form?
  4. Statisics

    Max 2A + 7B s.t. A + B greater than or equal to 12 2A + 2 B less than or equal too 26 B greater than or equal to 1 A, B greater than or equal to Which of the following would be found in the correct standard form?
  5. Algebra

    Hi. I have an answer for this and just need to confirm it. 2x+5(less than or equal to sign here)x + 6. I minused the x's on both sides of the greater then equal to sign; x +5 (greater then or equal to sign) = 6; x +5-5 (the sign here) …
  6. algebra

    use the inequality -4t-8 is less than or equal to 12 a. t is greater than or equal to ?
  7. Algebra

    Use a graphing calculator or a computer to graph the system of inequalities. Give the coordinates of each vertex of the solution region. 5x-3y is greater than or equal to -7 x-2y is greater than or equal to 3 3x+y is greater than or …
  8. math

    State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test the following statements. (a) The linear correlation coefficient is positive. Ho: ñ ---Select--- not equal to equal to greater than less …
  9. STATISTIC

    A two-tailed test is conducted at the 0.10 significance level. What is the P-value required to reject the null hypothesis?
  10. math

    7. The tennis team is selling key chains as a fundraiser. If its goal is to raise is at least 180, how many key chains must it sell at $2.25 each to meet that goal?

More Similar Questions

Post a New Question