Answer:
12mph
Step-by-step explanation:
Christy rode 60 miles in 5 hours.
60/5 = 12 miles per hour
Set it up like this, going from words on the page to letters and variables:
-3(2x+5) = -57. Twice a number is 2x, increased by 5 is 2x+5, and that is multiplied by -3 to get a total of -57. Distribute the -3 into the parenthesis to get -6x - 15 = -57. Move the 15 over by addition to get -6x = -42. Divide both sides by -6 to get that x = 7
Answer:
1. Ratoinal= 2
irrrational= 8.34284
A rational number can be put into a fraction while an irrational cannot.
My irrational number is a never-ending decimal that never repeats and my rational number is a whole number.
2.I don't know what it means to terminate. If I convert my rational number into a decimal no it does not repeat any digits because the decimal form of 2 would just be 2.0
3. A repeating decimal can be written and a rational number because it can be put into a fraction. ex; 4/9 is a fraction and in decimal, form it is 0.444444444...
Step-by-step explanation:
Answer:
a) 
b) 
c) "a.The mean of the sampling distribution stays the same, but the standard error decreases."
Step-by-step explanation:
a) We have a population with mean of 14.7 and standard deviation of 3.2.
We have to calculate the parameters of the sampling distribution (mean and standard deviation), for a sample size of n=100.
The mean for the sampling distribution is the same of the population:

The standard deviation of the sampling distribution is related to the population standard deviation by the inverse of the square of the sample size:

b) For a sample size of n=400, the mean is the same (14.7), but the standard deviation becomes:

c) "a.The mean of the sampling distribution stays the same, but the standard error decreases."
As we calculated, the standard error decreases as the sample size increases. This is because the variability of the variable is reduced as the sample size is bigger.
The mean stays the same independently of the sample size.
1/4 (8 + 6z + 12)
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Combine like terms :
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1/4 (6z + 20)
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Apply distributive property :
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1/4(6z) + 1/4(20)
3/2z + 5
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Answer: 3/2z + 5
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