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
SSSSS [86.1K]
3 years ago
5

EASYYYYY PLEASE HELP!! SOS

Mathematics
2 answers:
V125BC [204]3 years ago
7 0

Answer:

2n+6=20

-6 -6

2n=14

÷2 ÷2

n=7

Westkost [7]3 years ago
7 0

Answer:

n = 7 for #1

Step-by-step explanation:

2n + 6= 20

    -6     -6

2n =  14

/2       /2

n = 7

You might be interested in
Find the range of the function shown on the grid. "Brainliest only if correct"
kicyunya [14]

Answer:

b

Step-by-step explanation:

6 0
3 years ago
The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of
Yanka [14]
It wouldn’t be any of these I don’t think, however I don’t know what the # means.

I thought it would be C = 15 + x(0.20)

Hope this helps
5 0
3 years ago
Someone please help me with this :,D
german

Answer:

A hostel has provision for 45 students for 30 days.If 15 more students joined the hostel after 6 days,how long will provision last?

6 0
3 years ago
Read 2 more answers
Answer options <br><br> 2<br><br> 3<br><br> 4<br><br> 5
777dan777 [17]

Answer:

k = 5

Step-by-step explanation:

given f(x) then f(x) + k represents a vertical translation of f(x)

• If k > 0 then a shift of k units up

• If k < 0 then a shift of k units down

f(x) crosses the y- axis at - 2

g(x) crosses the y- axis at 3

Thus g(x) is 5 units vertically up from f(x)

since g(x) = f(x) + k → then k = 5

7 0
3 years ago
A student carried out an experiment to determine the amount of vitamin C in a tablet sample. He performed 5 trials to produce th
ivolga24 [154]

Answer:

There is not enough evidence to support the claim that the amount of vitamin C in a tablet sample is different from 500 mg.

P-value = 0.166.

Step-by-step explanation:

We start by calculating the mean and standard deviation of the sample:

M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{5}(490+502+505+495+492)\\\\\\M=\dfrac{2484}{5}\\\\\\M=496.8\\\\\\s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M)^2}\\\\\\s=\sqrt{\dfrac{1}{4}((490-496.8)^2+(502-496.8)^2+(505-496.8)^2+(495-496.8)^2+(492-496.8)^2)}\\\\\\s=\sqrt{\dfrac{166.8}{4}}\\\\\\s=\sqrt{41.7}=6.5\\\\\\

Then, we can perform the hypothesis t-test for the mean.

The claim is that the amount of vitamin C in a tablet sample is different from 500 mg.

Then, the null and alternative hypothesis are:

H_0: \mu=500\\\\H_a:\mu< 500

The significance level is 0.05.

The sample has a size n=5.

The sample mean is M=496.8.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=6.5.

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

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{6.5}{\sqrt{5}}=2.907

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{496.8-500}{2.907}=\dfrac{-3.2}{2.907}=-1.1

The degrees of freedom for this sample size are:

df=n-1=5-1=4

This test is a left-tailed test, with 4 degrees of freedom and t=-1.1, so the P-value for this test is calculated as (using a t-table):

\text{P-value}=P(t

As the P-value (0.166) is bigger than the significance level (0.05), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the amount of vitamin C in a tablet sample is different from 500 mg.

4 0
3 years ago
Other questions:
  • Nina ran 12 4/5 laps in 1/4 of an hour . At this rate , how many laps could she run in a hour ?
    11·1 answer
  • Which pile has more pennies
    6·1 answer
  • Alicia rolls two fair number cubes numbered from 1 to 6. She first defines the sample space, as shown below:
    6·2 answers
  • Determine the value of in, in each of the following cases, where n represents all positive integer values.
    6·1 answer
  • Show all steps<br> 16/x+10=8/2x-1
    12·1 answer
  • Can someone help with this please??
    8·1 answer
  • SUPER EASY!!!! 30 points!!!!!! Easy Elamentray school HW !!!!!!!! PLZ HELP!!!!
    15·2 answers
  • Which one of these tables shows a direct variation​
    10·1 answer
  • If C=x^{2}+7C=x 2 +7 and D=3x^{2}-4x+3,D=3x 2 −4x+3, find an expression that equals 3C+3D3C+3D in standard form.
    5·1 answer
  • What's 1+1? wrong answers only
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!