Dave bought 18 packets of cookies for $21.60. Each packet of cookies contains 20 cookies. find the cost of each cookie to the ne
1 answer:
You might be interested in
<u><em>Answer:</em></u>
5n-4
<u><em>Explanation:</em></u>
<u>The given expression is:</u>
<u>1- Take the negative as a common factor from both the numerator and the denominator. This will give us:</u>
<u>2- Cancel out the negative sign (common factor) from the numerator and denominator. This will give us:</u>
<u>3- Factor the numerator. This wil give:</u>
<u>4- Finally, cancel out the (17n+19) which common in both numerator and denominator. This will give us the final expression:</u>
5n-4
Hope this helps :)
5n-4
<u><em>Explanation:</em></u>
<u>The given expression is:</u>
<u>1- Take the negative as a common factor from both the numerator and the denominator. This will give us:</u>
<u>2- Cancel out the negative sign (common factor) from the numerator and denominator. This will give us:</u>
<u>3- Factor the numerator. This wil give:</u>
<u>4- Finally, cancel out the (17n+19) which common in both numerator and denominator. This will give us the final expression:</u>
5n-4
Hope this helps :)
Solution :
Group Before After
Mean 693.75 743.75
Sd 155.37 143.92
SEM 54.93 50.88
n 8 8
Null hypothesis : The preparation course not effective.
Alternative hypothesis : The preparation course is effective in improving the exam scores.
(after - before)