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
DedPeter [7]
3 years ago
8

Where is the line of Reflection?​

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
4 0
The line of reflection is 2
You might be interested in
Andre wrote the inequality to plan his time. Describe what 3x + 10 ≤ 30 represent in this inequality.
Neporo4naja [7]

Step-by-step explanation:

<h2><em><u>3</u></em><em><u>x</u></em><em><u> </u></em><em><u>+</u></em><em><u> </u></em><em><u>1</u></em><em><u>0</u></em><em><u> </u></em><em><u>≤</u></em><em><u> </u></em><em><u>3</u></em><em><u>0</u></em><em><u> </u></em></h2><h2><em><u>3</u></em><em><u>x</u></em><em><u> </u></em><em><u>≤</u></em><em><u> </u></em><em><u>3</u></em><em><u>0</u></em><em><u> </u></em><em><u>-</u></em><em><u> </u></em><em><u>1</u></em><em><u>0</u></em><em><u> </u></em></h2><h2><em><u>3</u></em><em><u>x</u></em><em><u> </u></em><em><u>≤</u></em><em><u> </u></em><em><u>2</u></em><em><u>0</u></em></h2><h2><em><u>x </u></em><em><u>≤</u></em><em><u> </u></em><em><u>2</u></em><em><u>0</u></em><em><u>/</u></em><em><u>3</u></em></h2>
7 0
2 years ago
Recently, TWA reported an on-time arrival rate of 78.4%. Assume that a later random sample of 750 flights results in 630 that ar
WINSTONCH [101]

Answer:

Step-by-step explanation:

1. Null hypothesis: u <= 0.784

Alternative hypothesis: u > 0.784

2. Find the test statistics: z using the one sample proportion test. First we have to find the standard deviation

Using the formula

sd = √[{P (1-P)}/n]

Where P = 0.84 and n = 750

sd =√[{0.84( 1- 0.84)/750]}

sd=√(0.84 (0.16) /750)

SD =√(0.1344/750)

sd = √0.0001792

sd = 0.013

Then using this we can find z

z = (p - P) / sd

z = (0.84-0.784) / 0.013

z =(0.056/0.013)

z = 4.3077

3. Find the p value and use it to make conclusions...

The p value at 0.02 level of significance for a one tailed test with 4.3077 as z score and using a p value calculator is 0.000008254.

4. Conclusions: the results is significant at 0.02 level of significance suck that we can conclude that its on-time arrival rate is now higher than 78.4%.

5 0
3 years ago
About Exercise 2.3.1: Proving conditional statements by contrapositive Prove each statement by contrapositive
Sladkaya [172]

Answer:

See proofs below

Step-by-step explanation:

A proof by counterpositive consists on assuming the negation of the conclusion and proving the negation of the hypothesis.

a) Assume that n is not odd. Then n is even, that is, n=2k for some integer k. Hence n²=4k²=2(2k²)=2t for some integer t=2k². Then n² is even, therefore n² is not odd. We have proved the counterpositive of this statement.

b) Assume that n is not even, then n is odd. Thus, n=2k+1 for some integer k. Now, n³=(2k+1)³=8k³+6k²+6k+1=2(4k³+3k²+3k)+1=2t+1 for the integer t=4k³+3k²+3k. Thus n³ is odd, that is, n³ is not even.

c) Suppose that n is not odd, that is, n is even. Now, n=2k for some integer k. Then 5n+3=10k+3=2(5k+1)+1, thus 5n+3 is odd, then 5n+3 is not even.

d) Suppose that n is not odd, then n is even. Now, n=2k for some integer k. Then n²-2n+7=4k²-4k+7=2(2k²-2k+3)+1. Hence n²-2n+7 is odd, that is, n²-2n+7 is not even.

e) Assume that -r is not irrational, then -r is rational. Since -1 is rational, then (-1)(-r)=r is rational. Thus r is not irrational.

f) Assume that 1/z is not irrational. Then 1/z is rational. Multiplucative inverses of rational numbers are rational, hence z is rational, that is, z is not irrational.

g) Suppose that z>y. We will prove that z³+zy²≤z²y+y³ is false, that is, we will prove that z³+zy²>z²y+y³. Multiply by the nonnegative number z² in the inequality z>y to get z³>z²y (here we assume z and y nonzero, in this case either z³>0=y³ is true or z³=0>y³ is true). On the other hand, multiply by z² (positive number) to get zy²>y³. Add both inequalities to obtain z³+zy²>z²y+y³ as required.

h) Suppose than n is even. Then n=2k, and n²=4k² is divisible by 4.

i) Assume that "z is irrational or y is irrational" is false. Then z is rational and y is rational. Rational numbers are closed under sum, then z+y is rational, that is, z+y is not irrational.

3 0
2 years ago
This is for middle school 8th grade please help me :)
Crazy boy [7]

Answer:

what do you need?

Step-by-step explanation:

I don't see a question.

8 0
3 years ago
Write the product using exponents. (very easy)
exis [7]

Answer:

-12^5

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • It took Marty 42 minutes to write a book report then he spend 18 minutes correcting his report explain how you use mental math t
    13·2 answers
  • AB and BC share point B to form AC. If AC=7 and BC=5, then what is the length of AB?
    15·2 answers
  • The tax rate is 8.5%. Whats is the tax on $95?
    8·2 answers
  • There are 31 fish in a tank.there are 3 more blue fish than green fish.how many blue fish is there
    8·1 answer
  • The distance from Los Angeles to Portland Oregon is 959 miles one way. If a pilot flies that round trip 15 times a year, how man
    10·2 answers
  • The solution set for 7q^2-28=0
    14·1 answer
  • Learn with an example
    7·1 answer
  • How do i solve this?
    10·1 answer
  • What is the answer to this question?
    12·1 answer
  • HELP:. In baseball, the distance from the pitcher's mound to the batter is 60.5 feet. A pitcher can throw the baseball at 121 fe
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!