Please help me solve this -4c=12 solve for c

2 answers:

5 0

C=-3
because a negative multiplyed by another negative is a positive so if you multiplyed -4 and -3 yu would get a positive 12

rosijanka [135]3 years ago

4 0

-4c = 12

divide both sides by -4

c = -3

You might be interested in

4 friends earn $10.40 for washing a car. how each did each friend get

uysha [10]

Answer:

$2.60

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

What is the weight on earth of a girl with a mass of 44 kg?

Alexus [3.1K]

431.2 is the answer to your question

3 0

3 years ago

What is the sum of the interior

frutty [35]

N is the amount of sides
sum=13 times 180 =2340

7 0

3 years ago

Y equals x minus V Over b

MAXImum [283]

Y=x-v\b
if that's all your information then that's the answer

8 0

3 years ago

The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airp

motikmotik

Answer:

The 95% confidence interval for the population mean rating is (5.73, 6.95).

Step-by-step explanation:

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

$M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{50}(6+4+6+. . .+6)\\\\\\M=\dfrac{317}{50}\\\\\\M=6.34\\\\\\s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M)^2}\\\\\\s=\sqrt{\dfrac{1}{49}((6-6.34)^2+(4-6.34)^2+(6-6.34)^2+. . . +(6-6.34)^2)}\\\\\\s=\sqrt{\dfrac{229.22}{49}}\\\\\\s=\sqrt{4.68}=2.16\\\\\\$

We have to calculate a 95% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=6.34.

The sample size is N=50.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

$s_M=\dfrac{s}{\sqrt{N}}=\dfrac{2.16}{\sqrt{50}}=\dfrac{2.16}{7.071}=0.305$