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
melisa1 [442]
3 years ago
12

Graph the systems of equations.

Mathematics
1 answer:
Pepsi [2]3 years ago
3 0
Using a graphical tool we obtain that the solution of this system
(intersection between the lines)

is given by the point (x,y) = (2,4)

You might be interested in
Question 2 Not yet answered Points out of 2
nata0808 [166]

Answer:

Trapezoid

Step-by-step explanation:

perpendicular: They are perpendicular due to the fact they cross at right angles to each other. Another true instance of perpendicular lines we will see in nature is a football field. All four corners of a football field are perpendicular to every other.

In the trapezoid attached there aren't any perpendicular sides. A and B are both obtuse angles in this diagram, and C and D are both acute angles. However, now not all trapezoids appear like this. ... Definition B: A trapezoid is any quadrilateral with at the least one pair of parallel sides.

please mark me brainliest!

3 0
2 years ago
The quality control manager of a chemical company randomly sampled twenty 100-pound bags of fertilizer to estimate the variance
lisabon 2012 [21]

Answer:

The 95% confidence interval for the variance in the pounds of impurities would be 3.829 \leq \sigma^2 \leq 14.121.

Step-by-step explanation:

1) Data given and notation

s^2 =6.62 represent the sample variance

s=2.573 represent the sample standard deviation

\bar x represent the sample mean

n=20 the sample size

Confidence=95% or 0.95

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 mean or variance 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.

The Chi square distribution is the distribution of the sum of squared standard normal deviates .

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}

On this case the sample variance is given and for the sample deviation is just the square root of the sample variance.

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

df=n-1=20-1=19

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical values.  

The excel commands would be: "=CHISQ.INV(0.025,19)" "=CHISQ.INV(0.975,19)". so for this case the critical values are:

\chi^2_{\alpha/2}=32.852

\chi^2_{1- \alpha/2}=8.907

And replacing into the formula for the interval we got:

\frac{(19)(6.62)}{32.852} \leq \sigma^2 \frac{(19)(6.62)}{8.907}

3.829 \leq \sigma^2 \leq 14.121

So the 95% confidence interval for the variance in the pounds of impurities would be 3.829 \leq \sigma^2 \leq 14.121.

4 0
3 years ago
Factor as the product of two binomials x^2+3x+2​
zhuklara [117]

Answer:

x^2+3x+2​ = (x+1)(x+2)

8 0
3 years ago
Read 2 more answers
John opens a saving account and by the end of the first month he has $300 in the account. By the end of a 12-month time span, Jo
Annette [7]

Answer:

$300

Step-by-step explanation:

8 0
3 years ago
I need help plz !!!!!!!
ArbitrLikvidat [17]
The answer is 12.3 cents. Hope this helped :))
7 0
3 years ago
Other questions:
  • Finding equal shares if two friends share 3 fruit bars
    6·2 answers
  • Can someone explain to me how to do this!!!
    5·1 answer
  • Copy and fill in the charts.
    12·1 answer
  • Someone that's good at 3.14 pie help ????
    15·1 answer
  • What is (7÷2+2×2×)×10
    9·2 answers
  • Tyler swims at a constant speed of 10 meters every 20 seconds. Use a unit rate to figure out how long it will take him to swim 1
    5·1 answer
  • The school that Chelsea goes to is selling tickets to a choral performance. On the first day of
    14·2 answers
  • Express your answer in scientific notation.<br> 4.9 X 10^5 – 5.8 X 10^4<br><br> WILL MARK BRAINLIST
    13·1 answer
  • Select the correct answer.<br> On the number line , which point is closest to the n?
    6·2 answers
  • Troy is going to spain and needs to convert his dollars to Euros. He knows that when he goes, $5.00 is equivalent to about 3.45
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!