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Gennadij [26K]
3 years ago
12

3. Consider the function y = x^2 + 4x – 4.

Mathematics
1 answer:
jeka57 [31]3 years ago
6 0

Answer:

a) (-2,-8)

b) not sure :(

c) (0,-4)

Step-by-step explanation:

To find the vertex rewrite in vertex form and use this form to find the vertex (h,k).  To find the y-intercept, substitute in 0 for x and solve for y.

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I think the answer is a scalene triangle
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soldier1979 [14.2K]
So what you do is
make into ax^2+bx+c=0 form

add-9/2 to both sides
y^2-2y+9/2=0
now we use the quadratice formula which is
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}

ax^2+bx+c=0
1y^2-2y+9/2
a=1
b=-2
c=9/2
subsitute
x=\frac{-(-2)+/- \sqrt{(-2)^{2}-4(1)(9/2)} }{2(1)}
x=\frac{2+/- \sqrt{4-(36/2)} }{2}
x=\frac{2+/- \sqrt{4-(18)} }{2}
x=\frac{2+/- \sqrt{-14} }{2}
x=\frac{2+/- \sqrt{-14} }{2}
x=1+/- \frac{\sqrt{-14} }{2}
x=1+/- \frac{\sqrt{14} \sqrt{-1}}{2}
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answer is C



6 0
3 years ago
What is the reciprocal of 7/11 in simpliest form
Leona [35]

Answer:

11/7is your <em>answer</em><em> </em><em>.</em><em>.</em><em>.</em><em>.</em>

Step-by-step explanation:

hope its help you

8 0
3 years ago
A migrating bird flies 378 miles in 14 hours. How many miles does it fly in 3 ​hours?
jolli1 [7]

Answer:

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Step-by-step explanation:

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The unit rate is 27 miles per hour

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6 0
3 years ago
Given the right angle triangle shown here, calculate:
charle [14.2K]

Answer:

see explanation

Step-by-step explanation:

(1)

(a)

sin(a) = \frac{opposite}{hypotenuse} = \frac{15}{17}

(b)

cos(a) = \frac{adjacent}{hypotenuse} = \frac{8}{17}

(c)

tan(a) = \frac{opposite}{adjacent} = \frac{15}{8}

----------------------------------------------------

(2)

(a)

sin(b) = \frac{opposite}{hypotenuse} = \frac{8}{17}

(b)

cos(b) = \frac{adjacent}{hypotenuse} = \frac{15}{17}

(c)

tan(b) = \frac{opposite}{adjacent} = \frac{8}{15}

5 0
3 years ago
Read 2 more answers
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