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
telo118 [61]
3 years ago
11

1. Use substitution to solve the system of equations.

Mathematics
1 answer:
nika2105 [10]3 years ago
8 0
Answer for 1 is -4,5 and for 2 is 0=0
You might be interested in
Answer quick Question 2 of 5
Anettt [7]

Answer: A

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Factor of 42a5b3, 35a3b4, and 42ab4
Scrat [10]
Can u explain it a little more clearly...
4 0
3 years ago
Select all expressions that are equivalent to 2+y+y+y+y+y+3?
ryzh [129]
I can’t see your choices, but this equation can be simplified to 5y + 5.

If you add the choices as a comment, I’m happy to help more.
7 0
3 years ago
(a) A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper took a SRS of 1200 regist
Sladkaya [172]

Answer:

n=9604

Step-by-step explanation:

1) Notation and definitions

X=620 number of people that would vote for the Republican candidate

n=1200 random sample taken

\hat p=\frac{620}{1200}=0.517 estimated proportion of people that would vote for the Republican candidate

p true population proportion of people that would vote for the Republican candidate

Me= 0.01 represent th margin of error.

Confidence =0.95 or 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 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{p(1- 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 0.01 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)  

The problem says that we need to use \hat p =0.05, and replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.96})^2}=9604  

And rounded we have that n=9604

6 0
3 years ago
What is the y-intercept of the line?
Amanda [17]

Answer:

The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept. The y-intercept of this line is the value of y at the point where the line crosses the y axis.

Step-by-step explanation:

<em> got this answer from (www.Math.com) </em>

<em></em>

<em>Glad I helped! =)</em>

5 0
3 years ago
Other questions:
  • A home owner has a monthly budget of $400 to spend on their homes landscaping. If they spent 35% of their budget this month on l
    10·2 answers
  • Rashad has 25 stamps. he shared them equally among himself and four friends. then rashad found two more in pocket. what is the e
    12·2 answers
  • Ratios 24 dollars for 9 books how much is worth one book
    12·1 answer
  • On the packaging for a triangular sail, the edge measurements for the sail are listed as
    13·2 answers
  • 3x+2=9+2x what is x?
    13·2 answers
  • A pair of dice is rolled. What is the probability of getting a sum of 6?
    7·1 answer
  • Write 95% as a fraction in simplest form
    12·2 answers
  • 100 pts for an answer. one day jasmine earned $25.20 for 6 hours of work. Another day jasmine earned 16.80 for 4 hours of work.
    10·1 answer
  • I need help with this please
    8·1 answer
  • Factor:<br> a^2 +4a+5<br><br> Can Include imaginary numbers
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!