![Jasten](/avatars/30902.jpg)
Jasten
14.12.2020 •
Mathematics
A pair of pants at Cool Topic originally cost $59. They are on sale for $32. What is the percent of change, rounded to the nearest whole number?
Solved
Show answers
More tips
- H Health and Medicine Why Do Humans Have One Heart?...
- S Style and Beauty How to knit a hooded cowl?...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- S Style and Beauty Tricks and Tips: How to Get Rid of Freckles...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
- F Family and Home How to Properly Use a Water Level?...
- D Dating, Love, Relationships 10 Useful Tips on How to Survive a Breakup?...
- F Food and Cooking Apple Cider Vinegar: The Ultimate Health and Beauty Solution...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
Answers on questions: Mathematics
- M Mathematics PLZZZ HELPP Multiply. Your answer should be a monomial in standard form. (-4r^3)(-5r^3)=...
- M Mathematics Can you explain y=58+3x...
- M Mathematics to identify the y-intercept of a quadratic function, would you choose the vertex form or standard form? explain...
- M Mathematics 4.16 x 10-5 = ? 8.0 x 10-4...
- M Mathematics Exam is worth 145 points 50 questions. some are 2 points and some are 5. how many question are 5 and how many are 2...
- H History The common idea within American culture that “lol” means “laugh out loud” is an example of which of the following?...
- S Social Studies Acoach tells a player the correct way to inbound a basketball from the sideline; at the same time the coach is demonstrating how to throw the ball inbound in a game-like...
- S Social Studies Who wrote the story of plymouth and was elected its second governor...
Ответ:
Given:
Given that Mrs. Galicia’s solution for the equation.
We need to determine whether Mrs. Galicia’s solution is correct or not.
Also, we need to determine the correct solutions.
Mrs. Galicia’s solution:
Step 4:![(x-4)^2=25](/tpl/images/0585/3718/4d36d.png)
Step 5:![x-4=25](/tpl/images/0585/3718/7873c.png)
After step 4, Mrs. Galicia’s did not take square root on both sides to determine the value of x.
Thus, Mrs. Galicia’s made in mistake in step 5, by solving the equation without taking square root on both sides.
Hence, Mrs. Galicia’s solution is wrong.
Correct solutions:
The equation is![x^{2} -8x-9=0](/tpl/images/0585/3718/59564.png)
Solving, we get;
Completing the square, we have;
Taking square root on both sides, we get;
Thus, the values of x are given by
Thus, the correct solutions are x = 9 and x = -1