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
fredd [130]
3 years ago
15

How low can 19/25 be reduced?

Mathematics
1 answer:
erastova [34]3 years ago
5 0

Answer:

It can't be reduced any farther.

Step-by-step explanation:

You might be interested in
Is a heart shape a quadrilateral
dedylja [7]
No it not because of it, not 4 sided
8 0
3 years ago
Factor the expression over the complex numbers.<br><br><img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20%2B18" id="TexFormula1
AleksAgata [21]

Here we are given the expression:

x^{2}+18

Now let us equate it to zero to find x first,

x^{2}+18=0

Now subtracting 18 from the other side,

x^{2}=-18

taking square root on both sides,

So we will get two values of x as ,

x=3\sqrt{-2}

x=-3\sqrt{-2}

Now we can write square root -1 as i,

So our factors become,

x=3i\sqrt{2}

x=-3i\sqrt{2}

Answer:

The final factored form becomes,

(x+3i\sqrt{2})(x-3i\sqrt{2})



7 0
3 years ago
Read 2 more answers
(PLZZZZ HELP ME its actually easy I am trying to check my work) Bob's family of three was driving to Washington D.C.. They were
Anon25 [30]
Yes, they have enough money and
3 0
3 years ago
We learned in Exercise 4.18 that about 90% of American adults had chickenpox before adulthood. We now consider a random sample o
liraira [26]

Answer:

a) 108 people with a standard deviation of 3.286335

b) No

c) 0.218163 or around 21.82%

d) See explanation below.

Step-by-step explanation:

This situation can be modeled with the Binomial Distribution which gives t<em>he probability of an event that occurs exactly k times out of n, and is given by </em>

<em>\large P(k;n)=\binom{n}{k}p^kq^{n-k} </em>

<em>where  </em>

<em>\large \binom{n}{k}= combination of n elements taken k at a time. </em>

<em>p = probability that the event (“success”) occurs once </em>

<em>q = 1-p </em>

In this case, the event “success” is finding an American adult who had  chickenpox before adulthood with probability p=0.9

and n=120 American adults in the sample.

The <em>standard deviation for this binomial distribution</em> is

\large s=\sqrt{npq}

where <em>n is the sample size 120 </em>

a)

We consider a random sample of 120 American adults. How many people in this sample would you expect to have had chickenpox in their childhood?

If about 90% of American adults had chickenpox before adulthood, we expect to find 90% of 120 = 0.9*120=108 people in the sample who had chickenpox in their childhood.

The  standard deviation would be

\large s=\sqrt{120*0.9*0.1=3.286335}

b)

Would you be surprised if there were 105 people who have had chickenpox in their childhood?

No, because 105 and 108 are in the interval [mean - s, mean +s]

c)

What is the probability that 105 or fewer people in this sample have had chickenpox in their childhood?

The probability that 105 or fewer people in this sample have had chickenpox in their childhood is

\large \sum_{k=0}^{105}\binom{120}{k}0.9^k0.1^{120-k}

We compute this value easily with a spreadsheet and we get

\large \sum_{k=0}^{105}\binom{120}{k}0.9^k0.1^{120-k}=0.218163\approx 21.82\%

d)

How does this probability relate to your answer to part (b)?

A binomial distribution with np>5 and nq>5 with n the sample size as is the case here, behaves pretty much like a Normal distribution with mean np and standard deviation \large \sqrt{npq}, so around 60% of the data are in the interval  [mean -s, mean +s] and 40% outside, so roughly <em>20% of the data should be in [0, mean-s] </em>

4 0
3 years ago
At a birthday party there were five more girls than boys. If the ratio of girls to boys was 4 to 3,
exis [7]

Let number if boys be x

  • No of girls=x+5

ATQ

\\ \sf\longmapsto \dfrac{x+5}{x}=\dfrac{4}{3}

\\ \sf\longmapsto 3(x+5)=4x

\\ \sf\longmapsto 3x+15=4x

\\ \sf\longmapsto 4x-3x=15

\\ \sf\longmapsto x=15

<h3>Number of girls</h3>

\\ \sf\longmapsto x+5=15+5=20

3 0
2 years ago
Other questions:
  • Denise’s mother bought some zucchini for $0.78 per pound. If she paid $2.73 for the zucchini, how many pounds of zucchini did sh
    12·2 answers
  • Solve for x, y, and z. <br> y=1/2z<br> x+2y+5z=2<br> 3x+6y-3z=9
    10·1 answer
  • Samples of size n= 240 are randomly selected from the population of numbers (O through 20)
    10·1 answer
  • What does it mean if the slope of a line is zero?
    8·1 answer
  • What value does the 3 represent in the number 16.344 ?
    6·1 answer
  • Plz answer this asap
    9·2 answers
  • Find the simple interest on the following hint I = prn
    7·1 answer
  • There are many ways to collect data about solar cells. The following information should help you judge whether solar energy powe
    10·1 answer
  • The wholesale cost for a baseball glove at a sporting goods store is $16.50. The store plans to mark up the glove by 120%. What
    10·1 answer
  • Find the number of degrees in the third angle of the triangle.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!