![shiiIjustneedananswe](/avatars/14525.jpg)
shiiIjustneedananswe
02.01.2020 •
Mathematics
Two quadratic functions are shown.
function 1:
f(x) = 3x2 + 6x + 7 function 2:
x g(x)
−2 13
−1 7
0 3
1 7
which function has the least minimum value and what are its coordinates?
function 1 has the least minimum value and its coordinates are (−1, 4).
function 1 has the least minimum value and its coordinates are (0, 7).
function 2 has the least minimum value and its coordinates are (−1, 7).
function 2 has the least minimum value and its coordinates are (0, 3).
Solved
Show answers
More tips
- F Food and Cooking Choosing the Best Water Filter: Tips and Recommendations...
- H Health and Medicine How Much Does Abortion Cost? Expert Answers and Insights...
- H Health and Medicine Contraceptive Pills After 35: The Importance Of Choosing The Right Medication...
- C Computers and Internet How to Set Up Internet on iPhone? Detailed Guide with Step-by-Step Instructions...
- P Philosophy 8 привычек, чтобы достичь счастливой жизни...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- G Goods and services How to Choose the Right Iron: Purchase Tips...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- H Health and Medicine How to Choose the Right Glasses?...
- H Health and Medicine What vaccines do children need?...
Answers on questions: Mathematics
- M Mathematics Solve the following inequality: 2(x++5)...
- M Mathematics It seems easy i just cant figure this one out!...
- M Mathematics What percentage of the world uses calculators...
- M Mathematics Devon purchased tickets to an air show for 7 adults and 2 children. the total cost was $173. the cost of a child s ticket was $8 less than the cost of an adult s ticket. find...
- M Mathematics You get paid $10 an hour. in order to make $210, you need to work 21 hours. if you work the same amount of hours for four days and you work the remaining hours on the fifth...
- M Mathematics David was eating 20 grams of ice cream every thirty seconds from his ice cream cone. as the weather was very hot, the 300-gram ice cream was melting and dripping down 5 times...
- M Mathematics Charles got a raise from $5.00 an hour to $7.00 an hour. this was a rise of what percent?...
- M Mathematics The sum of the measures of angle a and angle b is 180°. which term describes the relationship between angles a and b? adjacent angles supplementary angles complementary angles...
- M Mathematics In a dog show , there will be a gold and a silver medal awarded. there are 5 finalist. in how many different ways can the 2 medals be awarded?...
- M Mathematics Wich lake has a surface area tat is 14,938 square miles greater than the surface area of lke ontario ? dra amodel and model and write a number sentence to solve the problem....
Ответ:
Ответ:
Since the quadratic is basically already in vertex form (y=a(x−h)2+k, where (h,k) is the vertex), we can see that the vertex from 0=−0.018(x−20)2+8 is (20,8).
This means that the maximum height (since the parabola opens downward) is 8 feet and it happens 20 feet away from Audrey
When the ball hits the ground, y=0, so we have 0=−0.018(x−20)2+8. We could expand the binomial and use the quadratic formula, but it’s much easier to use the square root method, since we have a square in the original:
0−8−0.018±80.018−−−−−√x−20x=−0.018(x−20)2+8=(x−20)²=(x−20)²−−−−−−−−√=±21.08=41.08
Note that we had to “throw away” the negative part of the solution. The ball will hit the ground 41.08 feet from Audrey.
Really I can't understand it because of ² and 2