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musickatia [10]
3 years ago
12

What is the value of r?

Mathematics
1 answer:
KIM [24]3 years ago
4 0

Answer:

its 40

Step-by-step explanation:

180-100=80

80/2= 40

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Find the average value of the function on the given interval.<br> f(x)=(2x-1)1/2; [1,13]
Leni [432]

Answer:

The average value of the function on the given interval 6.5.

Step-by-step explanation:

Consider the given function is

f(x)=\dfrac{2x-1}{2}

We need to find the average value of the function on the given interval [1,13].

f(x)=\dfrac{2x}{2}-\dfrac{1}{2}

f(x)=x-0.5

The average value of the function f(x) on [a,b] is

Average=\dfrac{1}{b-a}\int\limits^b_a {f(x)} \, dx

Average value of the function on the given interval [1,13] is

Average=\dfrac{1}{13-1}\int\limits^{13}_{1} {x-0.5} \, dx

Average=\dfrac{1}{12}[\dfrac{x^2}{2}-0.5x]^{13}_{1}

Average=\dfrac{1}{12}[\dfrac{(13)^2}{2}-0.5(13)-(\dfrac{(1)^2}{2}-0.5(1))]

Average=\dfrac{1}{12}[78-0]

Average=6.5

Therefore, the average value of the function on the given interval 6.5.

6 0
3 years ago
In your stor 155 class, the professor returns midterm 2 and claims that the average score was 83 out of 100 with a standard devi
Marizza181 [45]
The null hypothesis is that the mean is 83 out of 100.  The alternative hypothesis is that the mean is less than 83.
8 0
3 years ago
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Evaluate f(x)= - 3 x - 8; find f(-4)<br><br><br> please answer
guapka [62]

Answer:

4

Step-by-step explanation:

Input -4 into the equation which comes out to

-3 * (-4) - 8

Which equals 4

3 0
3 years ago
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Can somebody please help me?!! I will give BRAINLIEST!!
Wewaii [24]

Answer:

Step-by-step explanation:

Mark the two points (-1,7) and (1,-1) on the graph.  Then draw a straight line between them.  To determine the equation that goes through these two points, we can use the two given points to find the slope of the line.  The standard form of a straight line equation is

y = mx + b,

where m is the slope and y is the y-intercept (the value of y when x = 0).

Slope is also known as the "Rise"/"Run" - the change in y divided by the change in x.  We can use the two points to calculate this:

       Rise (-1-(7) = -8   Run = (1 - (-1) = 2

The slope is therefore (-8/2) or -4.  

y = -4x + b

We can find b by entering either of the two points in y = -4x + b and solve for b.  I'll use (1,-1) since I have my 1's multiplication table memorized

y = -4x + b

-1 = -4(1) + b

b = 3

The straight line equation that connects the two points is

  y = -4x + 3

You can graph this equation (e.g., on DESMOS) to see how it intersects the points.  <u>[Attached]</u>

The coordinates of the y intercept are (0,3).

5 0
2 years ago
Can Someone Help Me Please. ?
dolphi86 [110]
I’m pretty sure it’s the second one sorry if it’s wrong
5 0
3 years ago
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