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kifflom [539]
3 years ago
13

Alain throws a stone off a bridge into a river below.

Mathematics
1 answer:
harkovskaia [24]3 years ago
6 0

the answer is 3 seconds

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What is the equation written in vertex from of a parabola with a vertex of (4, –2) that passes through (2, –14)?
vichka [17]

Answer:

y = -3(x - 4)² - 2

Step-by-step explanation:

Given the vertex, (4, -2), and the point (2, -14):

We can use the vertex form of the quadratic equation:

y = a(x - h)² + k

Where:

(h, k) = vertex

a  =  determines whether the graph opens up or down, and it also makes the parent function <u>wider</u> or <u>narrower</u>.

  • <u>positive</u> value of a = opens <u><em>upward</em></u>
  • <u>negative</u> value of a = opens <u><em>downward</em></u>
  • a is between 0 and 1, (0 < a < 1) the graph is <u><em>wider</em></u> than the parent function.
  • a > 1, the graph is <u><em>narrower</em></u> than the parent function.

<em>h </em>=<em> </em>determines how far left or right the parent function is translated.

  • h = positive, the function is translated <em>h</em> units to the right.
  • h = negative, the function is translated |<em>h</em>| units to the left.

<em>k</em> determines how far up or down the parent function is translated.

  • k = positive: translate <em>k</em> units <u><em>up</em></u>.
  • k = negative, translate <em>k</em> units <u><em>down</em></u>.

Now that I've set up the definitions for each variable of the vertex form, we can determine the quadratic equation using the given vertex and the point:

vertex (h, k): (4, -2)

point (x, y): (2, -14)

Substitute these values into the vertex form to solve for a:

y = a(x - h)² + k

-14 = a(2 - 4)²  -2

-14 = a (-2)² -2

-14 = a4 + -2

Add to to both sides:

-14 + 2 = a4 + -2 + 2

-12 = 4a

Divide both sides by 4 to solve for a:

-12/4 = 4a/4

-3 = a

Therefore, the quadratic equation inI vertex form is:

y = -3(x - 4)² - 2

The parabola is downward-facing, and is vertically compressed by a factor of -3. The graph is also horizontally translated 4 units to the right, and vertically translated 2 units down.

Attached is a screenshot of the graph where it shows the vertex and the given point, using the vertex form that I came up with.

Please mark my answers as the Brainliest, if you find this helpful :)

8 0
2 years ago
Describe the steps you used to solve the equation and find the amount of Carrie’s allowance. Linear equation:  1/4 a + 1/3 a + 8
zzz [600]

Answer:24

Step-by-step explanation:

Subtract 8 from 22 = 1/4a+1/3a=14

Add the fractions together =7/12a=14

Divide 14 by 7/12 and a=24

4 0
2 years ago
Read 2 more answers
Solve the inequality 5(2h + 8) &lt; 60
Ad libitum [116K]

Step-by-step explanation:

5(2h+8) <60

10h +40< 60

10h + 40-40 < 60-40

10h < 20

10h/10 < 20/10

h < 2

7 0
3 years ago
H e l p m e p l e a s e
Molodets [167]

Answer:

D

Step-by-step explanation:

maybe this will help you .

5 0
2 years ago
Read 2 more answers
What does m equal 2+2m=6
Lorico [155]
2 + 2m = 6 equals m = 2.

First, 
subtract 2 from both sides. Your problem should look like: 2m = 6 - 2.
Second, simplify 6 - 2 to get 4. Your problem should look like: 2m = 4.
Third, divide both sides by 2. Your problem should look like: m = \frac{4}{2}
Fourth, simplify \frac{4}{2} to 2. Your problem should look like: m = 2, which is the answer. 
7 0
3 years ago
Read 2 more answers
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