![20lm1207](/avatars/36111.jpg)
20lm1207
04.02.2021 •
Mathematics
Question 3 of 10
Which of the following functions best describes this graph?
6
-5
O A. y=x2-9x+ 20
O B. y = x2 + 9x+ 20
O C. y= x2 + x - 12
O D. y= x2 - 8x+18
Solved
Show answers
More tips
- C Computers and Internet The Best Antivirus Programs for your PC...
- H Health and Medicine Angina: Causes, Symptoms, and Treatment...
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
Answers on questions: Mathematics
- M Mathematics Determine the number of girls in a math class with 91 students, if there are 180 girls for every 184 boys? explain how you got answer...
- M Mathematics Jeena has 5 packets of seeds. each packet has 12 seeds. jeena wants to divide the seeds evenly among 10 flower pots. how many seeds can she plant in each flower?...
- M Mathematics Evaluate 6w-7p for w = − 5 w=-5 and p = 5...
- M Mathematics How do i change 13x -11y= -12 to standard form...
- M Mathematics Jim eats 1/3rd of the pie and sally eats 1/5th of the pie. what fraction of the pie is left over...
- M Mathematics 1. what is the length of segment_ad?...
- M Mathematics The backpacking club is having some posters printed the printer charges $180 plus 250 per poster how many posters can be printed for $1,000 explain...
- M Mathematics What are examples of ratio numbers answer...
- M Mathematics Using a number line to order the numbers numbers numbers from least to greatest 0.003 and 0.03 in 0.033 and 0.0 31...
- M Mathematics How do you draw a picture of 1/6 of a whole- in -one road...
Ответ:
A
Step-by-step explanation:
you can find the vertex of each equation and then compare to the graph
x = -b/2a
A) x = -(-9)/2(1); x = 9/2 or x = 4 1/2
plug 4 1/2 into equation as 'x' to find 'y'
y = (9/2)² - 9(9/2) + 20
y = 81/4 - 81/2 + 20
y = 81/4 - 162/4 + 80/4
y = -81/4 + 80/4
y = -1/4
the only option with a vertex at (9/2, -1/4) is A
Ответ: