Ana2
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Questions Answered

Ana2:
Group Title
f(x,y) = (xy + x^2)/(x^2 + y^2) if (x,y) is not (0,0)
0 if (x,y) = (0,0)
…
 updated one year ago
 18 replies
 3 Medals
Mathematics

sirryan1:
Group Title
A movie store sells DVDs for $11 each. What is the cost C of n DVDs? Identify the situation as discrete or continuous.
 updated one year ago
 3 replies
 2 Medals
Mathematics

Dlaw68:
Group Title
Men have a 16.836% chance of dying at age 90. 3 men from a group of 90 year old men were chosen. What's the probability all 3 die this year
 updated one year ago
 5 replies
 No Medals Yet
Mathematics

Ana2:
Group Title
If f(x,y) = sin (x,y), x = 3t and y = t^2. Consider z(t) = f(x(t),y(t)), for all t belongs to R.
(a) Calculate z'(t) directly.
…
 updated one year ago
 16 replies
 1 Medal
Mathematics

Ana2:
Group Title
Please help me check my work. I needed to find the tangent plane and normal line of the function f(x,y) = x^3*y at point (1,2,f(1,2)). I wro…
 updated one year ago
 2 replies
 1 Medal
Mathematics

Ana2:
Group Title
Please help me check my work. I needed to find the tangent plane and normal line of the function f(x,y) = x^3*y at point (1,2,f(1,2)).
 updated one year ago
 7 replies
 1 Medal
Mathematics

Trevor625:
Group Title
Find the volume of the solid obtained by rotating about xaxis the region bounded by y = cosx and y = 0 and x = 0 and x = pi/2
 updated one year ago
 2 replies
 1 Medal
Mathematics

Ana2:
Group Title
Please help me check my work. I needed to find the tangent plane and normal line of the function f(x,y) = x^3*y at point (1,2,f(1,2)).
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

zofia:
Group Title
If the temperature in Anchorage is 11 and the temperature in Minneapolis is 2 , which city has a greater temperature?
 updated one year ago
 7 replies
 No Medals Yet
Mathematics

Ana2:
Group Title
Please help me check my work. I needed the equation for the tangent line to the elipse 2x^2 + y^2 = 3 and that was parallel to 2x + y = 5.
 updated one year ago
 31 replies
 2 Medals
Mathematics

qais16:
Group Title
How many x intercepts does the graph of the function f(x) = x 3 + 4 have?
 updated one year ago
 8 replies
 1 Medal
Mathematics

Ana2:
Group Title
Please help me check my work. I needed the equation for the tangent line to the elipse 2x^2 + y^2 = 3 and that was parallel to 2x + y = 5.
 updated one year ago
 4 replies
 No Medals Yet
Mathematics

Ana2:
Group Title
Would you help me with this integral?
∫ 1 / lnx dx from 3 to + infinity. I need to know it it diverges.
 updated one year ago
 7 replies
 1 Medal
Mathematics

Ana2:
Group Title
I need to know if the improper integral from 1 to + infinity ( ln x / ( x + ln (x + 1) ) dx converges. Help?
 updated one year ago
 22 replies
 4 Medals
Mathematics

Jaylikescookies:
Group Title
Can somebody help me solve this? D:
5x + 10 = x + 50
 updated one year ago
 21 replies
 3 Medals
Mathematics

luisz:
Group Title
If n+2/5 is an integer, what is the remainder when n
is divided by 5?
 updated one year ago
 37 replies
 1 Medal
Mathematics

Trinity909:
Group Title
Determine if the argument is valid or invalid. Give a reason to justify answer.
If the bell rings, then we answer the door.
…
 updated one year ago
 5 replies
 No Medals Yet
Mathematics

Trinity909:
Group Title
Given the argument and its Euler diagram below, determine whether the syllogism is valid or invalid
 updated one year ago
 7 replies
 1 Medal
Mathematics

Trinity909:
Group Title
Determine which, if any, of the three statements are equivalent.
I) If the tax collector is calling, then I am not at home.
II) If I am n…
 updated one year ago
 9 replies
 1 Medal
Mathematics

sommersquid:
Group Title
Choose the correct simplification of the expression
 updated one year ago
 7 replies
 1 Medal
Mathematics

smcenearney7:
Group Title
Express the vector u= (5, 1, 1) as a linear combination of the vectors v1=(2,2,4), v2=(8,5,10) and v3=(4,1,1). That is, find c1,c2, and c…
 updated one year ago
 5 replies
 1 Medal
Mathematics

WhiteFlower:
Group Title
CAN SOMEONE HELP ME?!?! (IN THE FILE)
…
 updated one year ago
 14 replies
 1 Medal
Mathematics

byndbtch:
Group Title
I have two functions I cannot figure out.
1) f(1)=2*1^2 + 1
2)f(1)=1+3
…
 updated one year ago
 9 replies
 No Medals Yet
Mathematics

Ana2:
Group Title
Help me with this, please.
Show that in R^n, the lines represented by su1 + u0 and tv1 + v0 are the same if and only if both v1 and v0  …
 updated one year ago
 9 replies
 1 Medal
Mathematics

Trinity909:
Group Title
In Exercises 13–32, determine whether the argument is valid or invalid. You may compare the argument to a standard form, given on page 155, …
 updated one year ago
 4 replies
 1 Medal
Mathematics

Ana2:
Group Title
Please, would anyone help me with this? I'm looking for a proof that pi is irrational.
 updated one year ago
 9 replies
 1 Medal
Mathematics

yoyogators:
Group Title
Please help me i really need it!!!
…
 updated 2 years ago
 15 replies
 2 Medals
Mathematics

Ana2:
Group Title
Help!!!!!!!
 updated 2 years ago
 4 replies
 1 Medal
Mathematics

rook:
Group Title
solve x^2 7x <or= 0
 updated 2 years ago
 3 replies
 No Medals Yet
Mathematics

Ana2:
Group Title
How do I find the trace of the curve gama (t) = (e^(t) cos t, e^(t) sin t)?
…
 updated 2 years ago
 3 replies
 No Medals Yet
Mathematics
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