Answer: 
Step-by-step explanation:
Here x represents the time taken by Kiran in reading (in minutes) and y represents the time taken by Andrew in reading (in minutes).
According to the question,
Andre read for 5/8 more than kiran.
Thus, The time taken by Andrew(in minutes) = time taken by kiran + 5/8 of time taken by kiran
= 
= 
= 
= 
Thus, required equation,

Answer:
Step-by-step explanation:
Data given and notation
represent the sample mean
represent the sample standard deviation
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
t would represent the statistic (variable of interest)
represent the p value for the test (variable of interest)
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to check if the true mean is different from 7.1 ppm, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:
(1)
t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".
Calculate the statistic
We can replace in formula (1) the info given like this:
The area of a square is s•s.
A= 6.25•6.25
A= 39.0625
Rounded= 39.06 square feet
(I'm assuming rounding to the significant digits means rounding to the hundredths since 6.25 is rounded to the hundredths.)
Answer:
Step-by-step explanation:
The associative property is helpful while adding or multiplying multiple numbers. By grouping, we can create smaller components to solve. It makes the calculations of addition or multiplication of multiple numbers easier and faster. Here, adding 17 and 3 gives 20.
the identity property of 1 says that any number multiplied by 1 keeps its identity. In other words, any number multiplied by 1 stays the same. The reason the number stays the same is because multiplying by 1 means we have 1 copy of the number.
Answer:
C
Step-by-step explanation:
(2x+1)(2x-1)/4x+2
(2x+1)(2x-1)/2(2x+1)
2x-1/2