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Mariana [72]
3 years ago
11

ASAP help me please thanks

Mathematics
2 answers:
Mariana [72]3 years ago
6 0
I think it’s c
STEP BY STEP EXPLANATION
Marianna [84]3 years ago
3 0

Answer: I think it's D

Step-by-step explanation:

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See the ​attached file.
Masja [62]

f(x) = 4x - x^2

1)

f(4) = 4(4) - 4^2 = 16 - 16 = 0

f(-4) = 4(-4) - (-4)^2 = -16 - 16 = -32

f(4) - f(-4) = 0 - (-32) = 32

2)

f(3/2) = 4(3/2) - (3/2)^2

f(3/2) = 6 - 9/4 = 15/4

√f(3/2) = √(15/4) = √15 / 2

3)

f(x + h) = 4(x + h) - (x + h)^2

= 4x + 4h -(x^2 + 2xh + h^2)

= 4x + 4h -x^2 - 2xh - h^2

f(x - h) = 4(x - h) - (x - h)^2

= 4x - 4h -(x^2 - 2xh + h^2)

= 4x - 4h -x^2 + 2xh - h^2

So

[f(x + h) -f(x - h) ] / 2h

= [4x + 4h -x^2 - 2xh - h^2 - ( 4x - 4h -x^2 + 2xh - h^2 )] / 2h

=( 4x + 4h -x^2 - 2xh - h^2 - 4x + 4h + x^2 - 2xh + h^2 ) / 2h

= (8h - 4xh) / 2h

= 2h(4 -2x) / 2h

= 4 - 2x

Answer: [f(x + h) -f(x - h) ] / 2h = 4 - 2x

3 0
3 years ago
THIS ONE IS KINDA EASY, BUT SOMEONE GIVE ME THE COORDINATES!!
Greeley [361]

Answer:

Line in slope-intercept form: y = 4/3 x + 4

y-intercept: 4

Slope: 4/3

Coordinates: (-3,0) and (0,4)

Step-by-step explanation:

In case you want to check the coordinates, just use this formula⤵⤵⤵ (Sorry if it's a bit small btw).

\frac{y _{2} - y _{1}  }{x _{2} - x _{1}}

Plug it in: ⤵⤵⤵

4 - 0 = 4

0 - (-3) = 0 + 3 = 3

Slope = 4/3

Since the coordinates equal our slope when we plug it in, that's how we know they are correct.

Hope this helps :)

3 0
3 years ago
A line passes through the point(-4,-6) and has a slope of 1/2 What is the<br> equation of the line?
alex41 [277]

Answer:

x-2y-8=0

Step-by-step explanation:

The equation of line is given by the relation

y-y1=m(x-x1)

where m is the slope

now, given x1=-4 and y1=-6 and the slope is 1/2.

<em>sub</em><em>stitute</em><em> </em><em>in</em><em>to</em><em> the</em><em> equation</em><em> </em><em>to</em><em> </em><em>get</em>

<em>y</em><em>+</em><em>6</em><em>=</em><em>1</em><em>/</em><em>2</em><em>(</em><em>x</em><em>+</em><em>4</em><em>)</em>

<em>mult</em><em>iplying</em><em> </em><em>through</em><em> </em><em>wi</em><em>th</em><em> </em><em>the</em><em> </em><em>L.C.M</em>

<em>whi</em><em>ch</em><em> </em><em>is</em><em> </em><em>2</em>

<em>2</em><em>(</em><em>y</em><em>+</em><em>6</em><em>)</em><em>=</em><em>1</em><em>/</em><em>2</em><em>×</em><em>2</em><em>(</em><em>x</em><em>+</em><em>4</em><em>)</em>

<em>2</em><em>y</em><em>+</em><em>1</em><em>2</em><em>=</em><em>x</em><em>+</em><em>4</em>

<em>maki</em><em>ng</em><em> </em><em>x</em><em> </em><em>the</em><em> </em><em>su</em><em>bject</em>

<em>x</em><em>=</em><em> </em><em>2</em><em>y</em><em>+</em><em>8</em><em> </em><em>hence</em><em> </em><em>the</em><em> </em><em>equation</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>li</em><em>ne</em><em> </em><em>is</em><em> </em><em>x-2y-8</em><em> </em><em>=</em><em>0</em>

4 0
3 years ago
Helppp me Please!!!!! :)
irina [24]

Answer:

x = 30 \\ y = 10

Step-by-step explanation:

8x + 6y = 300 \\ x + y = 40 \\ 6x + 6y = 240 \\ 2x = 60   \\ =  > x = 30 \\ y = 10

7 0
3 years ago
I’m not sure if it would be A or B, does anyone know?
KengaRu [80]
B.  It is vertically stretched by a factor of 4.  If you had x^2 versus 4x^2, when x is positive and increasing, 4x^2 is increased by 4 for every value of x.
5 0
4 years ago
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