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
julsineya [31]
3 years ago
15

A. Rectangles 2 and 4

Mathematics
1 answer:
user100 [1]3 years ago
6 0

Answer: C. Rectangles 1 and 3


Step-by-step explanation:

1. By definition, two rectangles are similar if they have equal shape bot do not have equal sizes.

2. You can know it the rectangle 1 and 3 are similar by the following proportions:

\frac{l_1}{l_3}=\frac{w_1}{w_3}

Where l_1 is the lenght of the rectangle 1, l_2 is the lenght of the rectangle 2, w_1 is the width of the rectangle 1 and w_2 is the width of the rectangle 2.

3. Subtitute values:

\frac{11m}{14m}=\frac{2.2m}{2.8m}

0.78=0.78

4. Then, the rectangle 1 and 3 are similar.


You might be interested in
Helppp im not sure about this one
PSYCHO15rus [73]
There’s no question here!
8 0
3 years ago
Konsum $30,000 at 5% for 7 years​
dolphi86 [110]

Answer:

Vehicle price ($):

32000

Down payment ($):

3000

Trade-in allowance ($):

0

Owed on trade-in ($):

0

Interest Rate (apr %) GET TODAY'S RATE:

4

Salex Tax, if financed (%):

4

Loan Years:

7

6 0
3 years ago
N experiment was conducted to test the effect of a new stain remover. Twenty stains were treated with stain remover A and stain
Klio2033 [76]

Answer:

For this case the statistic calculated is t= 1.37

p_v =0.17

So the p value is a very high value and using the significance level  given\alpha=0.1 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and there is enough evidence to conclude that we have a difference between the two means at 10% of significance.

Step-by-step explanation:

Data given and notation

\bar X_{A} represent the mean for the sample for A

\bar X_{B} represent the mean for the sample B

s_{A} represent the sample standard deviation for the sample A

s_{B}= represent the sample standard deviation for the sample B

n_{A}=20 sample size for the group poisoned

n_{B}=20 sample size for the group unpoisoned

t would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the two means are equal or not , the system of hypothesis would be:

Null hypothesis:\mu_{A} - \mu_{B} =0

Alternative hypothesis:\mu_{A} - \mu_{B} \neq 0

For this case is better apply a t test to compare means, and the statistic is given by:

t=\frac{\bar X_{A}-\bar X_{B}}{\sqrt{\frac{s^2_{A}}{n_{A}}+\frac{s^2_{B}}{n_{B}}}} (1)

t-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Calculate the statistic

For this case the statistic calculated is t= 1.37

Statistical decision

The significance level is 0.1 \alpha=0.1, but we can calculate the p value for this test. The first step is calculate the degrees of freedom, on this case:

df=n_{A}+n_{B}-2

The p value on this case is given

p_v =0.17

So the p value is a very high value and using the significance level  given\alpha=0,1 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and there is enough evidence to conclude that we have a difference between the two means at 10% of significance.

5 0
3 years ago
Find the slope of the line. A.-4, B.4, C. 1/4, D. -1/4
geniusboy [140]
You need to give us points from the line or a picture of it or we can't answer the question.
7 0
4 years ago
In triangle RST, RS=4, ST=8, RT=5 what type of angle is R
dem82 [27]
I would say that it's an acute angle ....
4 0
3 years ago
Read 2 more answers
Other questions:
  • Find the coordinates of the midpoint of a segment with the endpoints
    9·1 answer
  • Determine the percent of all voters that did not vote Republican or Democrat but voted "other" instead. Round your answer to the
    6·1 answer
  • What is the the value of the fourth term in a geometric sequence if a1=30 and r=1/2?
    9·1 answer
  • Match the reasons with the statements in the proof to prove that triangle ABC is congruent to triangle ABD, given that AB ⊥ BD,
    12·1 answer
  • PLZ HELP I WILL GIVE THE BRAINLEST AND 22 PTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! An expression is shown below: 6(m + 2 +
    7·1 answer
  • 2 5/6 - 11/4=?ggffcgyujjh
    8·1 answer
  • uh can someone help me with this please I'm confused ughhh I missed school for two weeks and dk how to do this​
    14·2 answers
  • Phil ate 2/3 of a Pizza. Erica eight 4/9 of the same sized pizza. Who ate more pizza? Explain
    6·2 answers
  • Will give brainliest
    5·2 answers
  • The cost of a new car included a 3.5% sales tax. If c represents the cost of the car
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!