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mafiozo [28]
3 years ago
15

9+a/6=8 need help is

Mathematics
2 answers:
tensa zangetsu [6.8K]3 years ago
4 0
A = -6

order of operations does division first, but you have to know that you must add -1 to 9 in order to get 8. Therefore, you must have a negative number over 6 and it has to be -6 in order for that negative number to be -1
coldgirl [10]3 years ago
4 0
<span>9+a/6=8
Subtract 9 from both sides
a/6= -1
Multiply 6 on both sides so that the only thing remaining on the left side is the variable a.
Final Answer: a = -6</span>
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A veterinarian collects data on the number of times race horses are raced during their careers. The veterinarian finds that the
SpyIntel [72]

Answer:

c. (12.12, 18.48)

Step-by-step explanation:

Hello!

The study variable is X: number of times a racehorse is raced during its career.

The average number is X[bar]= 15.3 and the standard deviation is S= 6.8 obtained from a sample of n=20 horses.

To estimate the population mean you need that the variable has a normal distribution, in this case, we have no information about its distribution so I'll assume that it has a normal distribution. With n=20 the most accurate statistic to use for the estimation is a Students-t for one sample, the formula for the interval is:

X[bar] ± t_{n-1;1-\alpha /2} * \frac{S}{\sqrt{20} }

t_{n-1;1-\alpha /2} = t_{19;0.975}= 2.093

[15.3 ± 2.093 * \frac{6.8}{\sqrt{20} }]

[12.12; 18.48]

Using a significance level of 95% you'd expect that the true average of times racehorses are raced during their career is included in the interval [12.12; 18.48].

I hope it helps!

8 0
3 years ago
Thanks this answer really helped I got %100 on my test
Rzqust [24]
I don’t understand if this is a math problem or a statement.
3 0
3 years ago
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Is this the right answer?
Ne4ueva [31]
Yes your answer is solved correctly
6 0
2 years ago
Math question!!!!!!!!!!!!!
BlackZzzverrR [31]

Answer:

the correct answer for that would be identity property

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3 years ago
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What is 35% of 240?
astraxan [27]

Answer:

Step-by-step explanation:

You need to multiply .35 * 240 which = 84.

of means multiply.

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