Algebra Pre-Algebra and Basic Algebra Math Forum

 January 12th, 2019, 03:53 PM #1 Member   Joined: Jan 2019 From: tornto Posts: 48 Thanks: 0 Help x-intercept 2 2. Which of the following parabolas opens upward and appears narrower than y = −3x^2 + 2x − 1? A. y = 4x^2 − 2x − 1 B. y = − 4x^2 + 2x − 1 C. y = x^2 + 4x D. y = − 2x^ 2 + x + 3 Answer: A CORRECT OR NOT 3. Which of the following parabolas is 2 units higher than y = 2x^2 − 4x − 1, but has the same shape and opens in the same direction? A. y = 2x^2 − 6x − 1 B. y = 2x^2 − 2x − 1 C. y = 2x^2 − 4x − 3 D. y = 2x^2 − 4x + 1 Answer D CORRECT OR NOT 4. What are the coordinates of the vertex of the parabola y = x^2 + 2x − 1? A. (−2,5) B. (−1,−2) ……… C. (−2,−1) D. (−1,2) Answer B CORRECT OR NOT 5. Which of the following equations has an axis of symmetry with the equation x = 1.5? A. y = 2x^2 − 6x − 1 B. y = 2x^2 − 3x + 1 C. y = x^2 + 6x − 3 D. y = 2x^2 + 3x + 2 Answer A CORRECT OR NOT THANKS MUCH Last edited by skipjack; January 12th, 2019 at 09:42 PM. January 12th, 2019, 07:05 PM #2 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1039 At how many help sites did you post this? January 12th, 2019, 09:49 PM #3 Global Moderator   Joined: Dec 2006 Posts: 21,105 Thanks: 2324 Well done, yorkmanz, your answers are all correct. Tags xintecept, xintercept Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post MBI Algebra 3 October 3rd, 2016 03:15 AM Igo Algebra 2 January 22nd, 2012 08:39 PM carl1234 Algebra 2 June 20th, 2010 05:53 AM chicagobearsconvulse Calculus 1 April 28th, 2009 06:40 AM DaKiNgAdAbLiNg Algebra 1 March 16th, 2008 09:36 PM

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