-p/3-8=3 what is the variable

the value of a baseball card can be represented by the equation y equals 3x + 39 where X represents the number of years that Rob

Blababa [14]

Answer:

I need the values of either X or Y to solve this. I can solve for what X is though.

Step-by-step explanation:

A: X = -12

B: X =78

C: X = 12.13

I hope this helps you, but since both X and Y are unknown variables, you can't solve it, only simplify (which it already is.)

3 0

3 years ago

I thought this was much more easier for you! :)

monitta

Problem 1)

The base of the exponential is 12 which is also the base of the log as well. The only answer choice that has this is choice B.

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Problem 2)

log(x) + log(y) - 2log(z)
log(x) + log(y) - log(z^2)
log(x*y) - log(z^2)
log[(x*y)/(z^2)]

Answer is choice D

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Problem 3)

log[21/(x^2)]
log(21) - log(x^2)
log(21) - 2*log(x)

This matches with choice B

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Problem 4)

Ln(63) = Ln(z) + Ln(7)
Ln(63)-Ln(7) = Ln(z)
Ln(63/7) = Ln(z)
Ln(9) = Ln(z)
z = 9

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Problem 5)

Ln(5x-3) = 2
5x-3 = e^2
5x = e^2+3
x = (e^2+3)/5

This means choice A is the answer

4 0

3 years ago

The sum of the square of a number and 34

telo118 [61]

<span>The sum of the square of a number and 34 = </span>x^2 + 34

hope it helps

6 0

3 years ago

Suppose that a committee is studying whether or not there is waste of time in our judicial system. It is interested in the mean

Svetach [21]

Answer:

a) Option 1 is correct.

The Student's t-distribution for 80 degrees of freedom should be used because we do not know the population standard deviation.

b) Confidence interval for the population is given as (6.27, 7.73)

c) Option 4 is correct.

We are 95% confident that the true population mean wait time at the courthouse lies within this interval.

Step-by-step explanation:

Sample Mean = 7 hours

Sample standard deviation = 3.3 hours.

Sample size = 81

To construct the confidence interval for the population mean time wasted,

Since there's no information on the population standard deviation, the t-distribution will be used.

The t-distribution is used when there is no information on the population mean or standard deviation. We then assume that the sample standard deviation is a good estimate of the population standard deviation. And that the sample mean too, is a good estimate of the population mean.

The degree of freedom for t-distribution is given as (n-1).

df = 81 - 1 = 80

Hence, the correct answer for (a) is Option 1.

The Student's t-distribution for 80 degrees of freedom should be used because we do not know the population standard deviation.

b) To construct the 95% confidence interval for the population mean time wasted

Confidence interval = (Mean) ± (Margin of error)

Mean = 7 hours

Margin of Error = (Critical value) × (Standard error)

Critical value = t-score for a significance level of (0.05/2) and a degree of freedom of 80.

Note that the significance level.is obtained by subtracting the confidence interval from 100% and dividing it by 2 to accommodate significance at the start and end of the distribution.

So, t (0.025, 80) = 1.990 (obtained from literature)

Standard error = (σ/√n) = (3.3/√81) = 0.3667

Margin of Error = (Critical value) × (Standard error)

= 1.990 × 0.3667 = 0.7297

Confidence interval = (Mean) ± (Margin of error)

= 7 ± 0.7297 = (6.2703, 7.7297) ≈ (6.27, 7.73)

c) The interpretation for confidence interval is that the range given by the confidence interval is understood to contain the true mean required (in this case, the population mean), with a certain confidence level.

So, it is clear that the right answer is "we are 95% confident that the true population mean wait time at the courthouse lies within this interval".

Hope this Helps!!!!

5 0

3 years ago

Order these fractions from least to greatest 2/3,7/12,3/4

solong [7]

Answer:

7/12, 2/3, 3/4

Step-by-step explanation:

7 0

3 years ago

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-p/3-8=3 what is the variable​

-p/3-8=3 what is the variable