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taurus [48]
2 years ago
10

The function y = x2 – 4x + 7 approximates the height, y, of a bird, and its horizontal distance, x, as it flies from one fence

post to another. All distances are in feet. Complete the square to find and interpret the extreme value (vertex).
Select two answers: one extreme value and one interpretation.



A. Minimum at (4, 7)
B. When the bird is 4 feet away from the first fence post, it reaches its minimum height of 7 feet.
C. When the bird is 2 feet away from the first fence post, it reaches its minimum height of 3 feet.
D. Minimum at (2, 3)
Mathematics
2 answers:
Salsk061 [2.6K]2 years ago
7 0
From the function y=x^2-4x+7
to complete the square we proceed as follows:
The vertex form is given by:
y=(x-h)^2+k
where (h,k) is the vertex:
thus from the function we shall have:
y=x^2-4x+7
c=(b/2a)²
c=(4/2)²=4
thus adding an subtracting 4 in the expression:
y=x^2-4x+4-4+7
y=(x-2)^2+3
thus the vertex will be:
(2,3)

The answer is:
<span>D. Minimum at (2, 3)</span>
iVinArrow [24]2 years ago
5 0

D and C is also the right answer..

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Y=x^2-4x+5 to factored form
harina [27]

Answer:

(2+i)(2-i)

Step-by-step explanation:

7 0
3 years ago
Solve the system by graphing.
nlexa [21]

When solving a system by graphing you need to see where the lines intersect.

Below is a picture of these lines graphed. The green line is y = x +4 and the blue line is y = 4x - 1

The red dot represents the intersection is about (1, 5)

The original point is: (1.667, 5.667)

Hope this helped!

4 0
3 years ago
IMPORTANT GUYS please help
rusak2 [61]

Answer:

x=3,y=7

Step-by-step explanation:

8x+3y=45

2x+3y=27

8x-2x=6x

45-27=18

<u>6</u><u>x</u><u>=</u><u>1</u><u>8</u>

6. 6

x=3

2x+3y=27

2(3)+3y=27

6+3y=27

3y=27-6

<u>3</u><u>y</u> = <u>2</u><u>1</u>

3. 3

y=7

3 0
3 years ago
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