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
Roman55 [17]
3 years ago
9

Choose the correct factorization for the polynomial.

Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
4 0

Answer:

D (4y-5)(3x-5)

Step-by-step explanation:

12xy -15x -20y +25

I will factor by grouping

12xy -15x      -20y +25

Factor out 3x from the first group and -5 from the second group

3x(4y-5)  -5(4y-5)

Now factor out (4y-5)

(4y-5)(3x-5)

You might be interested in
Nine minus the quotient of two and a number x
Dennis_Churaev [7]
9-2/x is the equation
7 0
3 years ago
Mike's electronics store sold the following number of cellphones on each of the seven days of a week. DayCell Phones Sold Sunday
bulgar [2K]

Answer:

  (c)  10 phones

Step-by-step explanation:

The mean is the sum divided by the number of contributors:

  (12 +10 +9 +5 +14 +10 +10)/7 = 70/7 = 10

The mean number of phones sold for the week was 10 phones.

6 0
3 years ago
In a survey, the planning value for the population proportion is . How large a sample should be taken to provide a confidence in
tatuchka [14]

Answer:

n=350

Step-by-step explanation:

Notation and definitions

n random sample taken  (variable of interest)

\hat p=0.35 estimated proportion  (value assumed)

p true population proportion

Confidence =0.95 or 95% (value assumed)

Me=0.05 (value assumed)

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.05 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.35(1-0.35)}{(\frac{0.05}{1.96})^2}=349.586  

And rounded up we have that n=350

4 0
3 years ago
What is 12 divided by 1230 in long division
Bess [88]
It is 102.5. You made it kind of confusing at first by putting the divisor first in your question then putting your dividend, but I understand what you meant.
5 0
3 years ago
Read 2 more answers
Solve the equation 23(9+x)=−5(4−x).
NemiM [27]

Answer:

x= -\frac{277}{18}

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • What is 19.2 x 10^8 minutes in hours
    14·1 answer
  • Please can you answer these two questions! ​
    7·1 answer
  • Naomi solves a system of equations using substitution. The system has infinitely many solutions. Which of the following could be
    8·1 answer
  • Plz help me i need the answers ASAP
    5·1 answer
  • Solve the equations: 1.3x–2−(3.3x+5)=2x+1
    8·1 answer
  • Wich is the greatest six digit number 860,553 or 865,530
    9·2 answers
  • Determine the zeros of the function f(x) = (x - 2)(x + 2)(x+1)^2
    14·2 answers
  • Simplify (y⁴)² help me plz I'm noy good at maths ​
    6·2 answers
  • The sum of two numbers is 22, and their difference is 12. What are the numbers?
    11·2 answers
  • A rectangle has a height of and a width of 7x-4.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!