I am positive that you are right Mark.
The actual question was easier:
If a + 2b = 14 and 5a + 4b = 16 what is the average (arithmetic mean) of a and b?
(a) 1.5
(b) 2
(c) 2.5
(d) 3
(e) 3.5
The answer is 2.5.
(6a + 6b = 30)/6 = a + b = 5
5/2 = 2.5
I think that I made it...
Thank you Mark.
I guess that I still don't understand why this is wrong. If I solve the equations I get:
x=5 and y=10
So the way that I am looking at it, I have a group of ten 5's and nineteen 10's. If I want to find the mean value for this group then wouldn't it make sense to add...
Homework Statement
When finding the arithmetic mean in a system of equations is there any reason why the method that I am using is wrong?
Find the arithmetic mean of x and y in the following set of equations
Homework Equations
3x + 5y = 65 and
7x + 14y = 175
The Attempt at...
Does this look right?
Aluminum wing is 30m at 20*C. At what temp would it be .05m shorter.
∆T = ∆l / α x l
∆T = -.05m/(25 x 10-6/*C) x 30m
∆T = -66.667
The wing would be at -46.667*C to be .05m shorter.
I'm sorry if I sound stupid not being able to figure this question out. The truth is I probably have no business being in a physics class. I'm going to school to be a therapist and am taking this class to fill a science requirement. I'm sure there are easier classes I could've taken, but a...
Homework Statement
Aluminum wing is 30m long at 20*c
At what temperature would the wing be .05m shorter?
The coefficient for linear expansion of aluminum is (16 x 10^-6/c)
I have no idea how to do this. I don't want an answer. Just an equation or a hint on what to do. Thank...