# Activity Stream

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• 09-23-2018, 10:13 AM
Is there a relationship between degrees of angles in a polygon to it's diagonals? What is the relationship between the degrees of angles in a...
22 replies | 784 view(s)
• 09-28-2018, 08:09 AM
On a quadratic equation such as 6x^2 + x - 2, I get these results as factors, (x - 1/2)(x + 2/3), from using quadratic formula. Yet my answer book...
13 replies | 806 view(s)
• 09-25-2018, 07:33 AM
How to determine which one is greater between the two 30 and 30√2? Could you explain, please?
15 replies | 585 view(s)
• 09-23-2018, 03:30 PM
B^D (4 words)
17 replies | 681 view(s)
• 10-06-2018, 03:44 AM
A 35mm diameter steel cable carries a mine skip to a depth of 625m. The mass of the skip is equal to the mass of the 625m length cable. The unit mass...
15 replies | 555 view(s)
• 10-02-2018, 06:05 PM
can you please simplify 5 - |x - 5|, given that x >5.
14 replies | 443 view(s)
• 09-24-2018, 06:55 PM
Here is the problem: 72. It is estimated that in a certain community the number of hours required to distribute new telephone books to x percent...
12 replies | 500 view(s)
• 10-03-2018, 07:25 PM
The following is a snapshot from Robert Blixer's College Algebra of the working out of a subtraction problem: How can those two minus x...
12 replies | 485 view(s)
• 10-12-2018, 12:53 PM
Area of a rt triangle, with the hypotenuse=r, horizontal=x, and vertical=sqrt(r2-x2) I should get an equivalent to A=1/2base*ht A=int sqrt...
14 replies | 434 view(s)
• 09-22-2018, 02:27 AM
I am struggling with the following question: Prove the sum of (nCk)*(mCr-k) = (m+n)Cr? In other words, we are required to prove: (mC0)*(nCr)...
11 replies | 476 view(s)
• 10-15-2018, 04:34 PM
I'm unsure how different bases are usually read aloud. Is 215 = 156 read as "twenty one base five equals fifteen base six"? Or "two fives and one...
13 replies | 228 view(s)
• 10-02-2018, 04:18 PM
Denis started a thread Position crypt in Math Odds & Ends
Rejects me, taking last place (6) 2 e's
11 replies | 602 view(s)
• 10-15-2018, 09:25 PM
Basically what I am trying to do is scale standard deviation using a value that is 0<x<1 So for example, if standard deviation (S)= .0001, and...
13 replies | 281 view(s)
• 09-26-2018, 01:16 PM
As we know If x=t² (distance w.r.t time graph), the slope is increasing or parabola. If we differentiate x with respect to time we get 2t (x= t²,...
10 replies | 463 view(s)
• 09-23-2018, 07:14 PM
I am studying for the PE exam and working my way through some probability questions and this one has got me stumped: "Four military recruits whose...
9 replies | 368 view(s)
• 10-18-2018, 10:11 AM
Can anyone offer me hints or check the answer i have got? I got sqrt(45) using a mixture of theorem involving semi-circles and similar triangles....
11 replies | 164 view(s)
• 09-28-2018, 11:39 AM
I imagine I just missed something blatantly obvious but the problem is "Ann earns double her normal hourly pay for each hour that she works over 40...
8 replies | 519 view(s)
• 09-24-2018, 12:11 PM
How to find the value of k from the linear equation (k-5)x+(4k2-9)y+(6k2-7k-3)=0 given that the line is parallel to y-axis?
8 replies | 405 view(s)
• 10-18-2018, 03:39 PM
hello friends, i have this assignment in induction i can not solve, if someone could give me a hand i will be very grateful. prove that- ∀n∈ℕ...
11 replies | 200 view(s)
• 10-10-2018, 09:04 AM
Okay, I'm helping someone right now do an f(x) problem but it's been YEARS since I did this. What we have is f(x) = 3k+2 The question is find...
9 replies | 284 view(s)
• 10-09-2018, 03:10 AM
Hi everyone, Can someone help me to simplify the following equation if possible? Xt = Xt-1 (1) where t=1...n, Xt & Xt-1 are time...
11 replies | 360 view(s)
• 09-25-2018, 04:29 PM
Denis started a thread Windy crypt in Math Odds & Ends
Raunchier storm (9) 1 e
11 replies | 455 view(s)
• 10-18-2018, 03:14 PM
sarahlou84 started a thread Height of a tree in Arithmetic
You want to get out of the sun and look for some shade. There are some trees by the side of the lake. You know you are just below 2 metres in height....
9 replies | 215 view(s)
• 10-04-2018, 01:45 PM
The underlined sum please. Can't do it and I've to submit an important asisgment on Saturday Sent from my CPH1609 using Tapatalk
9 replies | 295 view(s)
• 10-13-2018, 05:37 PM
Probability that some book is in a library is \frac{1}{3}. If the book is in the library, then it is equally probable that the book is on one of...
10 replies | 274 view(s)
• 10-15-2018, 10:17 AM
I need help finding specific problems for polynomial Inequalities. Every problem I’ve attempted with perfect squares has ended up wrong. I’ve...
10 replies | 172 view(s)
• 09-25-2018, 07:24 PM
Hello there. I'm trying to recreate a guitar body left handed (it's a right handed guitar). The body of the guitar is angled in relationship to the...
9 replies | 365 view(s)
• 09-25-2018, 02:18 PM
If the finance charge on an installment loan is $49.00 and the amount financed is$200.00, the finance charge per $1.00 is$0.245 ($49.00/$200.00). ...
8 replies | 445 view(s)
• 09-29-2018, 06:03 PM
https://ibb.co/nq1VRz I know that they are the same but I can't show it x1=sin(t) y1=cos(2t) z1=sin^2(t) x2=t y2=1-2t^2 z2=t^2
9 replies | 314 view(s)
• 09-22-2018, 10:33 PM
Question: In a survey carried out in a certain school, it is found that 3 out of 7 students passed the Mathematics test. If 8 students from that...
7 replies | 309 view(s)
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