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vekshin1
3 years ago
6

How to solve f(x)=x2-8x+5

Mathematics
1 answer:
vfiekz [6]3 years ago
4 0

Graph the parabola using its properties and the selected points.

Direction: Opens Up

Vertex:  

(

4

,

−

11

)

Focus:  

(

4

,

−

43

4

)

Axis of Symmetry:  

x

=

4

Directrix:  

y

=

−

45

4

x

y

2

−

7

3

−

10

4

−

11

5

−

10

6

−

7

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A manufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular binding ma
IrinaVladis [17]

Answer:

538 books should be tested.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

How many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence?

n books should be tested.

n is found when M = 0.08

We have that \sigma = 0.72

M = z*\frac{\sigma}{\sqrt{n}}

0.08 = 2.575*\frac{0.72}{\sqrt{n}}

0.08\sqrt{n} = 2.575*0.72

\sqrt{n} = \frac{2.575*0.72}{0.08}

(\sqrt{n})^{2} = (\frac{2.575*0.72}{0.08})^{2}

n = 537.1

Rounding up

538 books should be tested.

6 0
3 years ago
What is perimeter of 4 inch square
Kobotan [32]
4*4 is you answer just times 4*4

4 0
3 years ago
Read 2 more answers
Tom went on a bike ride to the store 3 miles away. If it took Tom 12 of an hour to get there and 23 of an hour to get back, what
anzhelika [568]

Answer: 0.1714 miles / hour

Step-by-step explanation:

Given the following :

Distance to the store = 3 miles

Time taken to get to store = 12 hours

Time taken to return = 23 hours

The average rate of speed for the trip =?

Average Speed = total distance traveled / total time taken

Total distance traveled = 2 × 3 miles = 6 miles

Total time taken = 12 + 23 = 35 hours

Average speed = 6 miles / 35 hours

Average speed = 0.1714 miles / hour

3 0
3 years ago
The figure shows Polygon ABCD and some of its transformed images on a coordinate grid:
Black_prince [1.1K]

Based on the fact that the Polygon ABCD was translated, then the polygon that is a translation of it will be Polygon 3.

<h3>What polygon is the translation of Polygon ABCD?</h3>

When a shape is translated, it is taken as it is from one area of the coordinate plane, to another area of the plane.

This means that it doesn't change in height, or orientation.

The only polygon that still looks like Polygon ABCD is Polygon 3 which means that it is the translated version.

Find out more on transformations at brainly.com/question/4289712

#SPJ1

3 0
1 year ago
Transformation!! Please only help if you have the answer!!
pshichka [43]

Answer:

the answer for this one is A

Step-by-step explanation:

mostly because for this you're only looking for H and not the rest of them so if you reflect is itll be in the same spot just on the opposite side

8 0
3 years ago
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