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Svet_ta [14]
3 years ago
15

If 3/5 = 24/a then what does a=?

Mathematics
2 answers:
Lelu [443]3 years ago
8 0
24/3 = 8

5 x 8 = a

5 x 8 = 40

a = 40

hope this helps
storchak [24]3 years ago
6 0
QUESTION : \frac{3}{5} = \frac{24}{a}. What I would do is divide 24 by 3, and once you do that, your answer is 8. So that leads you to the conclusion that 8 is multiplied by 3 to get 24. Move down to the 5 and the a. If the numerator of the first fraction is multiplied by 8 to get the numerator of the second fraction, then you can sure as heck believe that the same applies to both denominators.

So I would say you multiply 5 with 8. 5 × 8 is 40, and so a = 40.
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A lathe is set to cut bars of steel into lengths of 6 cm. The lathe is considered to be in perfect adjustment if the average len
Gnom [1K]

Answer:

t=\frac{5.97-6}{\frac{0.4}{\sqrt{93}}}=-0.723    

E. -0.723

df=n-1=93-1=92  

p_v =2*P(t_{(92)}  

Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm.

Step-by-step explanation:

Information provided

\bar X=5.97 represent the sample mean for the length

s=0.4 represent the sample standard deviation

n=93 sample size  

\mu_o =6 represent the value that we want to test

\alpha=0.05 represent the significance level

t would represent the statistic  

p_v represent the p value for the test

System of hypothesis

We need to conduct a hypothesis in order to check if the lathe is in perfect adjustment (6cm), then the system of hypothesis would be:  

Null hypothesis:\mu = 6  

Alternative hypothesis:\mu \neq 6  

since we don't know the population deviation the statistic is:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Replacing in formula (1) we got:

t=\frac{5.97-6}{\frac{0.4}{\sqrt{93}}}=-0.723    

E. -0.723

P value

The degrees of freedom are given by:

df=n-1=93-1=92  

Since is a two tailed test the p value would be:  

p_v =2*P(t_{(92)}  

Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm.

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Question 6. Geometry question.
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B. if two lines are perpendicular, then they intersect to form four right angles.

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Where is the opposite of the opposite of -1.9 situated on the number line ​
SashulF [63]

Answer:

B

Step-by-step explanation:

Opposite is 1.9

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