1 / 5

Ex. 6 Solve:

Ex. 6 Solve:. Multiply by common denominator. 2(x – 2) = 3x – (x)(x – 2). 2x – 4 = 3x – x 2 + 2x. x 2 – 3x – 4 = 0. (x – 4)(x + 1) = 0. x = 4, – 1. Ex. 7 Solve: |x 2 – 3x| = – 4x + 6. –( x 2 – 3x) = – 4x + 6. x 2 – 3x = – 4x + 6. – x 2 + 3x = – 4x + 6.

russell-avery
Télécharger la présentation

Ex. 6 Solve:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ex. 6 Solve: Multiply by common denominator 2(x – 2) = 3x – (x)(x – 2) 2x – 4 = 3x – x2 + 2x x2 – 3x – 4 = 0 (x – 4)(x + 1) = 0 x = 4, – 1

  2. Ex. 7 Solve: |x2 – 3x| = –4x + 6 –(x2 – 3x) = –4x + 6 x2 – 3x = –4x + 6 –x2 + 3x = –4x + 6 x2 + x – 6 = 0 0 = x2– 7x + 6 (x + 3)(x – 2) = 0 0 = (x – 6)(x – 1) x = -3, 2 x = 6, 1 |(-3)2 - 3(-3)| = -4(-3) + 6 |(6)2 - 3(6)| = -4(6) + 6 so 6 not good 18 = 18  so -3 good 18 = -18 |(2)2 - 3(2)| = -4(2) + 6 |(1)2 - 3(1)| = -4(1) + 6 2 = -2 so 2 not good 2 = 2  so 1 good

  3. Ex. 8 A ski club chartered a bus for a skit trip at a cost of $480. In an attempt to lower the bus fare per skier, the club invited nonmembers to go along. After five nonmembers joined the trip, the fare per skier was decreased by $4.80. How many club members are going on the trip? (Cost per skier)(# of skiers) = cost of trip (480/x – 4.80) (x + 5) = 480 (x – 20)(x + 25) = 0 x = 20, -25 (x + 5) = 480 (480 – 4.8x)(x + 5) = 480x 480x + 2400 – 4.8x2 – 24x = 480x – 4.8x2 – 24x + 2400 = 0 x2 + 5x – 500 = 0

  4. Compound Interest • A= future value • P = present value • r = interest rate • n = times compounded / year • t = years

  5. Ex. 9 When you were born, your grandparents deposited $5000 in a long-term investment in which the interest was compounded quarterly. Today, on your 25th birthday, the value of the investment is $25,062.59. What is the annual interest rate for this investment?

More Related