8. Find equivalent forms of the rational numbers having a common denominator in each
1 answer:
Answer:
26/65 = 2/5 and 6/13 = 30/65
Step-by-step explanation:
Hello!
The easiest way to find a common denominator is to find the factors of each denominator:
5: 1, 5
13: 1, 13
So the greatest common factor is 1. That means the smallest possible denominator will be 5 × 13 × 1.
5 × 13 × 1 = 65
So we can put each fraction with a denominator of 65.
65 ÷ 5 = 13
65 ÷ 13 = 5
So we will multiply each numerator by 13 and 5.
2 × 13 = 26
6 × 5 = 30
We will have
Hope this helps!
:D
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Answer:
21
Step-by-step explanation:
Using<em> Simple Random Sampling</em>, we can estimate the sample size by the formula
where
n = sample size
Z = the z-score corresponding to the confidence level 99.5%
S = the assumed standard deviation = 3 seconds
e = margin of error = 2 seconds
<em>It is worth noticing that the higher the confidence level, the larger the sample should be. </em>
The z-score corresponding to a confidence level of 99.5% can be obtained either with a table or the computer and equals
Z = 3.023
Replacing the values in our formula
So the size of the sample should be at least 21.
Answer:
The bill will be $26070.
Step-by-step explanation:
Your base plan costs you $30 a month
And each text sent or received is only 12 cents or $0.12.
Let the messages sent be = x
So, cost for messages become =
Let total bill cost be = y
Now, total bill will comprise of monthly plan charges plus message charges.
So, equation forms:
Now, given is that In one month 217,000 messages were sent between two brothers in Philadelphia.
So, their approximate bill will be :
=>
=> y = 26070
Therefore, bill will be $26070.