Ask questions and get helpful answers.

Solve the equation using the quadratic formula (if necessary, round your result to three significant digits and decide which number is smaller or larger x value).

2x^2 + x − 7 = 0

I used the quadratic formula and I got -2.13 as a smaller x-value and 1.6 as larger x-value.

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
2 answers
  1. I got both answers wrong.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. It asked for 3 significant digits, so your answers from the calculation are probably
    1.63745... and -2.13745...

    So for the accuracy asked for, try
    1.64 and -2.14

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
    👤
    Reiny

Answer this Question

Similar Questions

  1. Algebra 1 (Check work)

    4. A square has a side of 6.25 feet. What is the area in square feet? Round to the correct significant digits. Answer: 6.25 feet * 6.25 feet = 39.0625 square feet. 6.25 has three significant digits. Rounding 39.0625 to three significant digits is 39.1

  2. Math

    In a class of 83 students, 72 are present. What percentage of the students are absent? Provide answer up to two significant digits. a. 12 b. 13 c. 14 d. 15 What I did is I subtracted both 83 and 72 which is 11 and I put it as proportions. I put x as a

  3. chemistry

    A chemist determined by measurements that 0.0850 moles of mercury participated in a chemical reaction. Calculate the mass of mercury that participated in the chemical reaction. Round your answer to 3 significant digits.

  4. chemistry

    Ammonia chemically reacts with oxygen gas to produce nitric oxide and water . What mass of ammonia is consumed by the reaction of 4.5g of oxygen gas? Round your answer to significant digits.

  5. algebra

    A rocket is launched from atop a 76-foot cliff with an initial velocity of 107 ft/s. The height of the rocket above the ground at time t is given by . A) When will the rocket hit the ground after it is launched? Round to the nearest tenth of a second.

  6. Algebra

    Solve the equation. Use factoring or the quadratic formula, whichever is appropriate. Try factoring first. If you have any difficulty factoring, then go right to the quadratic formula. (Enter your answers as a comma-separated list.) (x+2)^2 + (x-7)(x-2)=16

  7. Calculus

    We are going to compute the cube root of 9 to 6 significant digits using Newton's method. Choose a function of the form 𝑓(𝑥)=(𝑥^𝑚)−𝐶 Give the formula for 𝑥_(𝑛+1) in terms of the previous value 𝑥_(𝑛) .

  8. Physics

    A plane is heading due south with an airspeed of 211 mph. A wind from a direction of 53 degrees is blowing at 17 mph. Find the bearing of the plane. (Note that bearings are measured from north, clockwise.) Round results to appropriate number of significant

  9. Math check please

    1. Solve the system of equations y=2x^2-3 y=3x-1 a)no solution b)(-1/2,5),(2,-5/2) c)(-1/2,-5/2),(2,5)**** d)(1/2,5/2),(2,5) 2. How many real number solutions are there to the equation 0=-3x^2+x-4? a)0 ***** b)1 c)2 d)3 3.solve the equation by completing

  10. algebra

    A system of equations consisting of a linear equation and a quadratic equation ____ has two solutions. a. always b. sometimes c. never ** The solutions given by the quadratic formula are ____ integers. a. always b. sometimes ** c. never Can someone check

Still need help?

You can ask a new question or browse existing questions.