Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#26 Help Me ! » V/r = I » 2012-05-26 04:46:02
- reallylongnickname
- Replies: 12
My method is this: Divide the numbers first, then move the decimal three steps to the right in order to convert to milli amps. What rule am I not following in mathematics?
#27 Re: Help Me ! » Qaud Q. » 2012-04-10 05:37:50
How did u get that?
#28 Help Me ! » Qaud Q. » 2012-04-10 03:11:23
- reallylongnickname
- Replies: 12
This is the Q. Im have problem with. The fractions and the integer thing throw me off. "Write a quadratic eq. with roots of 2/3 and - 4/5 in the form
where a, b, c are integers. "Example of what I do understand about a similar type of math problem:
general form with roots 6 and -7
#29 Re: Help Me ! » Linear Systems Q. » 2012-03-20 05:26:30
Ah yes thx bbbym.
#30 Help Me ! » Linear Systems Q. » 2012-03-20 04:58:21
- reallylongnickname
- Replies: 3
Total of 32 bulbs to be planted. Three times as many crocus bulbs then tulip bulbs. How many of each should be planted?
Does this set up look right? The next step I would do is substitute 3c + t into the 1st equation.
#31 Help Me ! » Financial Q. » 2011-06-16 14:21:19
- reallylongnickname
- Replies: 1
A $99,000 mortgage is to be repaid in regular monthly payments of $749.27 over 25 years. The interest rate is 7.9%/a compounded semi-annually which means that the equivalent monthly rate is 0.006477527
Q. How much is still owing on this mortgage after the first 4 years?
#32 Help Me ! » Cmpd Intrst » 2011-05-30 13:41:34
- reallylongnickname
- Replies: 2
[tex] A=P(1+i)^n[/tex] for these types of formulas, If I go 1 + 0.088 / 2 the answer is = 1.044
but if I go 1+ 0.88 = 1.088 /2 the answer is = 0.544
Why does the "=" mess things up?
#33 Re: Help Me ! » prove identity » 2011-05-12 14:59:40
Great, Nice clear explanation!
#34 Help Me ! » prove identity » 2011-05-12 14:06:19
- reallylongnickname
- Replies: 6
or
#35 Re: Help Me ! » try this tri » 2011-05-08 07:19:35
x = 10 sin20 /(sin120-sin20) = 6.527036
Bob
Could u brk this down plz. I don't know how this rearrangment came about.
#36 Re: Help Me ! » try this tri » 2011-05-08 06:08:05
I have AC = 16.53333 and BC = 6.53333
Woops! sorry, I forgot to add that I'm to find the perimeter of the triangle. It was almost 1am when I posted the original Q.
Thx Bob and all others. I assume AC is the longest and BC the shortest side. I then used the sin formula to find the 3rd side AB. Then added all three to equal 35.2 The answer for the perimeter agrees with answer in text book of 35cm.
#37 Help Me ! » try this tri » 2011-05-07 18:44:09
- reallylongnickname
- Replies: 10
Interior angles of a triangle are 120, 40 and 20 degrees. The longest side is 10 cm longer than the shortest side. Woops! sorry, I forgot to add that I'm to find the perimeter of the triangle. It was almost 1am when I posted this.
To start, would I make up a value for the longest side and add 10? I can use cosine law and or sine law. I know that the longest side is opposite the largest angle. Shortest side is opposite shortest angle.
#38 Re: Help Me ! » Area » 2011-04-30 00:51:59
Here u go this works. I used photobucket and ms paint.
#39 Re: Help Me ! » Area » 2011-04-29 16:25:24
Here is the triangle:
I spent a couple of hours drawing it on whiteboard and it wont upload.
#40 Help Me ! » Area » 2011-04-28 14:17:05
- reallylongnickname
- Replies: 7
An isoscelese triangle plus a equilateral triangle come together to form one triangle. I'm hoping someone could explain the breakdown especially in lines 2 and 3 with the base times height thing going on.
The original problem askes to determine the exact area of triangle.
#41 Help Me ! » exp. eq » 2011-04-20 05:37:25
- reallylongnickname
- Replies: 1
So for the coordinates (x, y) x is
My Q. is, how did the x become ????#42 Re: Help Me ! » Exp func application » 2011-04-17 23:42:48
Log is more efficient, but anyway, the t/6 is # of periods (time in months).
#43 Re: Help Me ! » Exp func application » 2011-04-17 21:09:10
If divided 49.877702 by 12, the answer is 4.16 years. To actually use the method I used above, I would probably change the
to 2t or something.#44 Re: Help Me ! » Exp func application » 2011-04-17 20:55:30
It's solved it for months, but what if I wanted it solved in years?
#45 Help Me ! » Exp func application » 2011-04-17 15:19:57
- reallylongnickname
- Replies: 7
A new car costs $24000. It loses 8% value every 6 mths. The formula is;
What would be the half life formula of the car in years? The value would be $12000.
#46 Re: Help Me ! » Transformation of exp func » 2011-04-14 23:15:33
Ok, disregard the +10 for now. It may not belong there.
We know that
and theis going to be what is inside the brackets. So
My Q is about . How did it go from being to being then finaly,
#47 Re: Help Me ! » Transformation of exp func » 2011-04-14 21:42:15
Hello, here is what the original Q askes, but I'm not expecting to go through all this. I'm looking for the equation part.
-state the transformations that must be applied to f(x)
-state the y-int and the eq of asymptote
-sketch the new function
-state domain and range
#48 Help Me ! » Transformation of exp func » 2011-04-14 16:11:49
- reallylongnickname
- Replies: 5
If I have a function for example:
-Where did the +10 come from?
-what is the rule for getting the x value?
-where did the the (x-3) come from?