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noname [10]
3 years ago
7

Can someone help me please with both questions?

Mathematics
1 answer:
cluponka [151]3 years ago
5 0
He really put a link
You might be interested in
1<br>Determine the value of k if g(x)=4x+k is a tangent to f(x)=-x²+8x+20​
tangare [24]

Answer:

k=24

Step-by-step explanation:

The tangent of the function f at x=a, can be found by differentiating f w.r.t. x and then replacing x with a.

f=-x^2+8x+20

Differentiating both sides:

f'=(-x^2+8x+20)'

By sum rule:

f'=(-x^2)'+(8x)'+(20)'

By constant multiple rule:

f'=-(x^2)'+8(x)'+(20)'

By constant rule:

f'=-(x^2)+8(x)'+0

By power rule:

f'=-2x+8

f' at x=a is -2a+8

This is the slope of any tangent line to the curve f.

The slope of g is 4 if you compare it to slope intercept form y=mx+b.

So we gave -2a+8=4.

Subtracr 8 on both sides: -2a=-4

Divide both sides by -2: a=2

The tangent line to the curve at x=2 is y=4x+k.

To tind y we must first know the y-coordinate of the point of tangency.

If x=2, then

f(2)=-(2)^2+8(2)+20=-4+16+20=12+20=32

So the point is (2,32).

g(x)=4x+k and we know g(2)=32.

This gives us:

32=4(2)+k

32=8+k

k=32-8

k=24

6 0
2 years ago
The Hamilton Brush Company issued 2500 shares of common stock worth 100,000,000 total.What is the par value of each share
Marrrta [24]
The par value of each share is
100,000,000÷2,500
=40,000 per share
7 0
3 years ago
Which expression is equal to -4<br><br>A - (-12/3)<br><br>B - (-20/5)<br><br>C -8/-2<br><br>D 16/4
Sonja [21]

The expression that is equal to -4 is D 16/-4 which means  option D is correct. ( it should be noted that option D is not written properly)

<h3>Why  is that 4 is equals to  16/-4?</h3>

In a mathematical  expression   when as negative vale is been used to multiply a negative value, then we will have a positive values , same thing with when a negative value is used to multiply a positive value, a negative value will be gotten.

In the case of the question, if positive value is used to divide a negative value, a negative value will be gotten, hence  expression that is equal to -4 is  16/-4 which is means  optionD  is correct.

Therefore, option C is correct.

Learn more about mathematical  expression at:

brainly.com/question/723406

#SPJ1

6 0
1 year ago
Find the mean (average) of the set of numbers. 12 , 6 , 7 , 19 , 12 , 3 , 3
riadik2000 [5.3K]

Answer:

10

Step-by-step explanation:

To figure the mean, add up the numbers, 3+3+6+7+9+12+12+19=71 then divide it by the number of data points 71/7=10.1428571, I rounded it to 10.

7 0
3 years ago
What is the equation of this line in slope intercept forn?
Alika [10]

Answer:

We conclude that the equation of this line in the slope-intercept form will be:

  • y = -3z+2

Step-by-step explanation:

We know that the slope-intercept form of the line equation is

y=mx+b

where m is the slope and b is the y-intercept.

Given the equation

3z +y=2

Writing the equation in the slope-intercept form of the line equation by simplifying it

subtracting 3z from both sides

3z+y-3z = -3z+2

y = -3z+2

Therefore, we conclude that the equation of this line in the slope-intercept form will be:

  • y = -3z+2
4 0
3 years ago
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