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Inessa05 [86]
2 years ago
13

Solve the inequality: x - 13 - 4x > 2

Mathematics
2 answers:
KATRIN_1 [288]2 years ago
5 0

Answer:

X< -5

Step-by-step explanation:

BigorU [14]2 years ago
4 0

Answer: x<−5

Step-by-step explanation: hope this help

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V\Researchers periodically survey a few thousand of the patients taking a certain medication in order to make connections betwee
yanalaym [24]

Answer:

The correct answer is - an observational study.

Step-by-step explanation:

It is given that, Researchers periodically survey a few thousand of the patients. These are taking specific medicine patients and researchers taking this survey to find the connection between that medication and the subjects' general health.

So, it can say that the researchers observed the patient's health by the effect of the medication, therefore, the Observational Study is the given method of gathering data.

6 0
3 years ago
In a study of parents' perceptions of their children's size, researchers asked parents to estimate their youngest child's height
tatyana61 [14]

Answer:

Test statistic t=6.505

P-value=0

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that parents tend to underestimate their youngest child's size.

Then, the null and alternative hypothesis are:

H_0: \mu=0\\\\H_a:\mu> 0

The significance level is assumed to be 0.05.

The sample has a size n=39.

The sample mean is M=7.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=7.2.

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

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{7.2}{\sqrt{39}}=1.153

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{7.5-0}{1.153}=\dfrac{7.5}{1.153}=6.505

The degrees of freedom for this sample size are:

df=n-1=39-1=38

This test is a right-tailed test, with 38 degrees of freedom and t=6.505, so the P-value for this test is calculated as (using a t-table):

P-value=P(t>6.505)=0

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 parents tend to underestimate their youngest child's size.

5 0
3 years ago
What is the equivalent fraction
Sonja [21]

the answer I believe is 0.63. I did something similar awhile ago

5 0
3 years ago
Read 2 more answers
Use the numbers 2,3,5 and 8 to write an expression that has a value of -1. You may use any operations, and you must use each of
MaRussiya [10]
(5 * 2) - (8 + 3) = 10 - 11 = -1
7 0
3 years ago
Read 2 more answers
PLEASE HELP MEEE IM SO STRESSED!
Lana71 [14]

Answer:

(a) -2-(-9)=-2+9

=7

(b) -2-9=-11

(c) -2-(-9)-(-2)=-2+9+2

=9

6 0
2 years ago
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