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jok3333 [9.3K]
3 years ago
15

PLEASE HELP WITH THIS!!! I WILL MARK YOU BRAINLIEST!!!

Mathematics
1 answer:
PolarNik [594]3 years ago
4 0

Answer:

cant you only get brainliest by answering a lot of questions?

Step-by-step explanation:

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Use the four-step process to find f'(x) and then find f'(1), f'(2), and f'(3).
Soloha48 [4]

Step 1: evaluate f(x+h) and f(x)

We have

f(x+h) = -(x+h)^2+6(x+h)-5 = -(x^2+2xh+h^2)+6x+6h-5

= -x^2-2xh-h^2+6x+6h-5

And, of course,

f(x)=-x^2+6x-5

Step 2: evaluate f(x+h)-f(x)

f(x+h)-f(x)=-x^2-2xh-h^2+6x+6h-5-(-x^2+6x-5)=-2xh-h^2+6h

Step 3: evaluate (f(x+h)-f(x))/h

\dfrac{f(x+h)-f(x)}{h}=-2x-h+6

Step 4: evaluate the limit of step 3 as h->0

f'(x) = \displaystyle \lim_{h\to 0} \dfrac{f(x+h)-f(x)}{h}=-2x+6

So, we have

f'(1) = -2\cdot 1+6 = 4,\quad f'(2) = -2\cdot 2+6 = 2,\quad f'(3) = -2\cdot 3+6 = 0

5 0
3 years ago
Construct an accurate copy of triangle DEF. Check that EF = 4.6 cm. ​
garri49 [273]

Answer:

Angles on a straight line add up to 180°

Therefore, the interior angle D of the triangle = 180 - 150 = 30°

Draw a horizontal line of 8 cm - label DE.

Measure an angle of 30° from point D and draw a line.

Measure an angle of 90° from point E and draw a line.

These 2 lines will intersect at point F.

Erase the part of the lines that extend past the point of intersection.

7 0
3 years ago
Help on #6 need to know now
eduard
10 because first brackets is 0 second brackets is 10 15*0 is 0   0+10 is 10
4 0
3 years ago
PLLZZZZZZZ HEELLLPPPP
Mrrafil [7]

Answer:

f(9) = 72

Step-by-step explanation:

This is a piecewise function. You have to establish what part to plug in your x value based on the designations given in the function. In this case, x=9.

9>6, so we would follow the bottom designation! When writing the function, turn every "x" into a 9.

f(x) = 8x

f(9) = 8(9)

f(9) = 72

Hope this helps you out :)!

5 0
3 years ago
Read 2 more answers
So sorry but can you answer this question gonna pull my hair out
Dmitriy789 [7]
4 × 1 × 3 = 12
2 × 1 × 3 = 6
12 + 6 = 18 cubic ft
6 0
3 years ago
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