







Matched pairs 
20171213 

Lin pose la question :
PLEASE HELP WITH THIS VERY DIFFICULT STATISTICS QUESTION(the process would really help)
Imagine you and your 4 study group partners are interested in whether all
those hours you spent together working on statistics problems for midterm
exam 2 actually helped your group's performance on that exam relative to its
performance on the first midterm exam. Suppose the first and second midterm
grades were as follows:
Is there sufficient evidence (at a = :05) to conclude that the group performed
better on midterm 2? Please provide all your calculations.

midterm 1 
midterm 2 
A 
25 
28 
B 
20 
19 
C 
15 
21 
D 
16 
25 
E 
20 
22 
Penny Nom lui répond. 





4444^4444 
20171210 

Sashi pose la question : 4444 to power of 4444=?
Please share the result with simplification. Penny Nom lui répond. 





Needing the area of an irregular Pentagon 
20171206 

Dale pose la question : I'm needing to find the square footage of an irregular pentagon.
I've seen the other questions similar to this one, but without a great deal of difficulty can't get you the angle degrees, or the length between opposing angles.
I'm hoping that a different bit of information can help. So here goes:
The longest side is 67ft long.
One of its legs is 39ft long, and the other is 18ft long.
The leg off of the other end of the 39ft leg is 35ft long.
The leg off of the other end of the 18ft is 49ft long, and meets the other end of the 35ft side.
The information that I DO have, which I'm hoping makes the difference, is that the 39ft and the 18ft sides are parallel.
Also, while the angles at each end of the 67ft side are not right angles, they are fairly close to it,
approximately 80 degrees at the 39 ft side corner, and 100 degrees at the 18ft side corner.
Dale. Harley Weston lui répond. 





A range hood 
20171204 

Chuck pose la question : I'm building a custom range hood and can't seem to get the angles correct where the front and side panels intersect.
I saw a similar post but there's no way I can do the calculations for a Wolfram Alpha!
Here are the dimensions that I have (in inches)...
Base  Front 29 7/16" x side 19 3/16"
Top  Front 10" x side 9"
Front Panel Length (from base to top on an angle) 21"
Side Panel Length (from base to top on an angle)  17 9/16"
Vertical distance from the base to the top 14 1/4 inches.
Any help finding the bevel/miter of the two front corners where the sides meet the front panel would be greatly appreciated.
I will need the angle for the saw in degrees.
Thank you in advance!
Regards,
Chuck Harley Weston lui répond. 





An arithmetic sequence 
20171130 

yo pose la question : x; 2x+1; 11 are three consecutive terms of an arithmetic sequence.calculate x Penny Nom lui répond. 





The derivative of f(x)=2^x/x 
20171128 

Chhavi pose la question : f(x)=2^x/x.
Find f'(x). Penny Nom lui répond. 





GCD 
20171125 

A student pose la question : Suppose a,b, c are integers such that gcd(a,b)=gcd(a,c)=1. Show that gcd(a,bc)=1. Penny Nom lui répond. 





Abstract algebra 
20171125 

A student pose la question : Suppose a,b, c are integers such that gcd(a,b)=gcd(a,c)=1. Show that gcd(a,bc)=1. Penny Nom lui répond. 





Exponential form 
20171125 

Sherry pose la question : What is the exponential form of 3sqrt 15? Penny Nom lui répond. 





10 digit permutations 
20171124 

Ed pose la question : HI my question..
numbers1,2,3,4,5,6,7,8,9,0 how many combinations are there
example: 518, 269, 3470
example2:815,972, 3460
example3: 185,047,2369 Penny Nom lui répond. 





Heat equation 
20171123 

Max pose la question : What does du\dt=a(triangle)^2u mean. Can it be solved for t. Penny Nom lui répond. 





How many miles did he drive in one hour? 
20171121 

Ava pose la question : Graham drove 42 1/3 Miles in 1 1/3 hours. How many miles did he drive in one hour? Penny Nom lui répond. 





An expression for the area of a triangle 
20171119 

hari pose la question : why is area of a triangle drawn from centre of a circle i.e radii forming the sides is
1/2 *r^2 sin theta where r is radius Penny Nom lui répond. 





Jesse has dimes and nickels in his piggy bank. 
20171118 

Dee pose la question : Jesse has dimes and nickels in his piggy bank.
The number of nickels is 3 times the number of dimes.
If the total amount is $8.50, how many coins are there in total? Penny Nom lui répond. 





Blair is 12 years younger than Serena right now. 
20171118 

Dee pose la question : Blair is 12 years younger than Serena right now.
Three years ago Serena’s age was five times Blair’s age. What are their ages? Penny Nom lui répond. 

