1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ch4aika [34]
3 years ago
14

Solve the following quadratic equation for its exact value by using the square root principle.

Mathematics
1 answer:
Korvikt [17]3 years ago
5 0
Idk what the hell all that is but x = 1.802775637731995

4x^2 - 13 = 0

4x^2 = 13

13/4=3.25

x^2 = 3.25

x = ~1.8
You might be interested in
If the scale factor of Figure A to Figure B is<br> 7:2, find the perimeter of Figure A.
Daniel [21]

Answer:

  • I honestly don't k ow wish i can help if you can help me with one
6 0
3 years ago
Read 2 more answers
The resting heart rate for an adult horse should average about µ = 47 beats per minute with a (95% of data) range from 19 to 75
KatRina [158]

Answer:

a. 0.0582 = 5.82% probability that the heart rate is less than 25 beats per minute.

b. 0.1762 = 17.62% probability that the heart rate is greater than 60 beats per minute.

c. 0.7656 = 76.56% probability that the heart rate is between 25 and 60 beats per minute

Step-by-step explanation:

Empirical Rule:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean:

\mu = 47

(95% of data) range from 19 to 75 beats per minute.

This means that between 19 and 75, by the Empirical Rule, there are 4 standard deviations. So

4\sigma = 75 - 19

4\sigma = 56

\sigma = \frac{56}{4} = 14

a. What is the probability that the heart rate is less than 25 beats per minute?

This is the p-value of Z when X = 25. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{25 - 47}{14}

Z = -1.57

Z = -1.57 has a p-value of 0.0582.

0.0582 = 5.82% probability that the heart rate is less than 25 beats per minute.

b. What is the probability that the heart rate is greater than 60 beats per minute?

This is 1 subtracted by the p-value of Z when X = 60. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{60 - 47}{14}

Z = 0.93

Z = 0.93 has a p-value of 0.8238.

1 - 0.8238 = 0.1762

0.1762 = 17.62% probability that the heart rate is greater than 60 beats per minute.

c. What is the probability that the heart rate is between 25 and 60 beats per minute?

This is the p-value of Z when X = 60 subtracted by the p-value of Z when X = 25. From the previous two items, we have these two p-values. So

0.8238 - 0.0582 = 0.7656

0.7656 = 76.56% probability that the heart rate is between 25 and 60 beats per minute

3 0
2 years ago
X-4, for x=-4<br> Can you pls help me like NOW!!!!
boyakko [2]

Answer:

-8

Step-by-step explanation:

It's basically -4-4. Which means -(4+4) = -8.

5 0
2 years ago
Find the arc length of the following problem:​
Harrizon [31]

Answer:

61.261 {ft}^{2}

Step-by-step explanation:

\frac{270}{360}  \times 2\pi \: r \\  \frac{270}{360}  \times 2 \times \pi \times 13 \\  = 61.261 {ft}^{2}

<h3>Can I have the brainliest please?</h3>
5 0
3 years ago
Read 2 more answers
please help i will mark brainliest, no spam answers i will report.
vovikov84 [41]

9514 1404 393

Answer:

  (c)  (3, 3)

Step-by-step explanation:

Point E partitions both the x-distance and the y-distance in the ratio 2 : 1. That is, for either the x-coordinates or the y-coordinates, ...

  CE : ED = 2 : 1

Try the answers with the x-coordinates.

  CE : ED = (1 -(-1)) : (5 - 1) = 2 : 4 . . . . incorrect

  CE : ED = (-3 -(-1)) : (5 -(-3)) = -2 : 8 . . . . incorrect

  CE : ED = (3 -(-1)) : (5 -3) = 4 : 2 = 2 : 1 . . . . correct

  CE : ED = (-1 -(-1)) : (5 -(-1)) = 0 : 6 . . . . incorrect

The only viable choice is (3, 3).

_____

<em>Alternate solution</em>

For a partitioning of m : n, the desired point is ...

  E = (n×C +m×D)/(m+n)

For partitioning of 2 : 1, the desired point is ...

  E = (1×(-1, -3) + 2×(5, 6))/(2+1) = (-1+10, -3 +12)/3

  E = (3, 3)

3 0
2 years ago
Other questions:
  • What is 1.45,1 1/2,1 1/3,1.2 in order from least to greatest?
    13·1 answer
  • 8x -4y&gt;-28<br> 6y&gt;12x-36
    12·1 answer
  • What is x equal to? explain
    13·1 answer
  • . A mason has 7,758 bricks that he needs to share equally among 9 different building sites. How many
    12·2 answers
  • How many times can 15 go into 19
    11·2 answers
  • Suppose Henry is laying on the ground looking up at the sun that appears just over the top of a tree at
    5·1 answer
  • he tennis match ended at 5:10 P.M. and took 55 minutes to complete. What time did the tennis match start
    14·1 answer
  • Analyze the diagram below and complete the instructions that follow.
    10·1 answer
  • -3 -5 1 0 3
    13·1 answer
  • Please help whats the last meter on 10 will mark brainliest!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!