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
postnew [5]
3 years ago
7

Please check my answer!

Mathematics
1 answer:
umka21 [38]3 years ago
3 0

A ) P=6n+18 where N is the number of triangles. There's always two '9's and the 6 is based on how many triangles there are.

You might be interested in
Y+4=2 what is the answer for y
stepladder [879]

Answer:

y = -2

Step-by-step explanation:

y + 4 = 2

y = 2 - 4

y = -2

8 0
3 years ago
Read 2 more answers
A laptop producing company also produces laptop batteries, and claims that the batteries
gregori [183]

Answer:

There is enough evidence to support the claim that the batteries power the laptops for significantly less than 4 hours. (P-value = 0).

The null and alternative hypothesis are:

H_0: \mu=4\\\\H_a:\mu< 4

Step-by-step explanation:

<em>The question is incomplete: To test this claim a sample or population standard deviation is needed.</em>

<em>We will estimate that the sample standard deviation is 2 hours, and use a t-test to test that claim.</em>

<em> NOTE (after solving): The difference between the sample mean and the mean of the null hypothesis is big enough to reject the null hypothesis, even when we have a sample standard deviation of 3.5 hours, which can be considered bigger than the maximum standard deviation for the sample.</em>

This is a hypothesis test for the population mean.

The claim is that the batteries power the laptops for significantly less than 4 hours.

Then, the null and alternative hypothesis are:

H_0: \mu=4\\\\H_a:\mu< 4

The significance level is 0.05.

The sample has a size n=500.

The sample mean is M=3.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=2.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{2}{\sqrt{500}}=0.0894

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{3.5-4}{0.0894}=\dfrac{-0.5}{0.0894}=-5.5902

The degrees of freedom for this sample size are:

df=n-1=500-1=499

This test is a left-tailed test, with 499 degrees of freedom and t=-5.5902, so the P-value for this test is calculated as (using a t-table):

P-value=P(t

As the P-value (0) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the batteries power the laptops for significantly less than 4 hours.

5 0
3 years ago
This is 7th grade math, I really need to know this thanks!
Fynjy0 [20]

Answer:

Step-by-step explanation:

30*15%=9/2=4.5

so 4.5 would be travelling outside of New York

this gives 30-4.5=25.5 that are not traveling

5 0
3 years ago
Which choice is equivalent to the expression below?
Andre45 [30]

<u>Answer:</u>

C. 4\sqrt{7} -4x\sqrt{7} is correct

<u>Steps</u><u>:</u>

4\sqrt{7} -3\sqrt{7}x-x\sqrt{7} \\\\4\sqrt{7} -3\sqrt{7} x-\sqrt{7} x\\\\4\sqrt{7} +(-3\sqrt{7} x-\sqrt{7} x)\\\\4\sqrt{7} -4\sqrt{7} x

7 0
3 years ago
Read 2 more answers
What is the justification for step 2 in the solution process?
Maksim231197 [3]

Answer:

Subtract property of deviation becasue your subtracting 6y frrom both sides of the equation.

Step-by-step explanation:

1)Given: 12y - 40 - 4y = 6y - 18

2)Simplify by adding 12y + (-4y): 8y - 40 = 6y - 18

3)Subtract property of deviation: 8y -6y - 40 = 6y -6y - 18

2y - 40 = -18

<em>Hope this helped!</em>

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which weighs more 5 ounces or 150 grams
    11·2 answers
  • In aΔABC, if ∠B = 60° and the ratio of two sides is a : c = 2 : √3 + 1, then ∠A= ____.
    8·1 answer
  • A store has 30 boxes of melons each box holds 4 bags. Each bag holds 2 melons. What is the total number of melons in the store
    15·1 answer
  • How do you solve g/9+47=64. What do you get for g
    9·1 answer
  • If your good at geometry come here. I need your help and if you could help me out successfully I will give you BRAINLIEST and PO
    9·1 answer
  • Simplify the following expressions​
    10·1 answer
  • Brainliest to right answer
    6·2 answers
  • Harold’s balance in his savings account was $10,000. The savings account earns annual simple interest. At the end of 3 years, th
    6·1 answer
  • Which statement explains why 13x−13y=−26 shares a solution with this system of equations:
    14·1 answer
  • Fiona and her sisters grew over the past three months. She records the change in heights of her and her sisters in the table bel
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!