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Naddik [55]
3 years ago
12

When solving proportions, we set the cross products equal and then we ________.

Mathematics
1 answer:
Olin [163]3 years ago
6 0
Multiply each number across from another
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How can you write 5+5+5 using a different math operation
Len [333]

Answer:

five plus five plus five

Step-by-step explanation:

This is in wording

3 0
2 years ago
Read 2 more answers
An automobile manufacturer has given its van a 31.3 miles/gallon (MPG) rating. An independent testing firm has been contracted t
Fynjy0 [20]

Answer:

z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82  

The p value for this case would be given by:

p_v =2*P(z  

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true mean is not significantly different from 31.3 MPG

Step-by-step explanation:

Information given

\bar X=31.1 represent the sample mean  

\sigma=1.3 represent the population standard deviation

n=140 sample size  

\mu_o =31.3 represent the value that we want to test  

\alpha=0.02 represent the significance level for the hypothesis test.  

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to test if the true mean is equal to 31.3 MPG, the system of hypothesis would be:  

Null hypothesis:\mu =31.3  

Alternative hypothesis:\mu \neq 31.3  

Since we know the population deviation, the statistic is given by

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

Replacing we got:

z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82  

The p value for this case would be given by:

p_v =2*P(z  

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true mean is not significantly different from 31.3 MPG

4 0
3 years ago
When we carry out a chi square test of Independence the alternate hypothesis states that the two relevant classification blank
seropon [69]

Answer: that's false

Step-by-step explanation:

degrees of freedom=(r-1)(c-1)

If I'm wrong I'm sorry  

7 0
3 years ago
How would you draw a counterexample to this?
NeX [460]
Melanie said: 
Every angle bisector in a triangle bisects the opposite side perpendicularly.

A 'counterexample' would show an angle bisector in a triangle that DOESN'T
bisect the opposite side perpendicularly.

See my attached drawing of a counterexample.

Both of the triangles that Melanie examined have equal sides on both sides
of the angle bisector.  That's the only way that the angle bisector can bisect
the opposite side perpendicularly.  Melanie didn't examine enough different
triangles.

6 0
3 years ago
SOLVE FOR BOTH K's PLS
Zarrin [17]

Answer:

4 and -3 if im not wrong......

3 0
2 years ago
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