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• 08-20-2017, 10:11 AM
:idea: Another way to see how one expression comes from another is to work backwards. If you were to combine t - 1 + 1/(t + 1) into a single...
6 replies | 252 view(s)
• 08-20-2017, 10:06 AM
What have you tried or thought about, so far? Please also read the forum guidelines. Thank you. :cool:
3 replies | 159 view(s)
• 08-19-2017, 11:26 PM
An equation has only one equal sign. Please check your typing. What you have posted has no solution. Also, following Order of Operations, your...
1 replies | 125 view(s)
• 08-19-2017, 10:38 PM
Are you reading the question similar to having all possible combinations available, and a machine dispenses one at random? If so, then I agree...
7 replies | 314 view(s)
• 08-19-2017, 07:42 PM
The answer depends upon the function(s) involved. Can you post a specific example of what you have and explain what you desire? :cool:
1 replies | 84 view(s)
• 08-19-2017, 07:37 PM
If the expression a^2 + 4ab represents a constant, then symbols a and b are not variables.
3 replies | 164 view(s)
• 08-19-2017, 07:32 PM
The given equation represents an equality between a transcendental function and an algebraic function. This type of equation cannot be solved in...
5 replies | 183 view(s)
• 08-19-2017, 07:22 PM
The exercise statement as posted is flawed. Your equations are correct, using the given information, but the solutions don't make sense. Make...
3 replies | 137 view(s)
• 08-18-2017, 02:42 AM
If the inserted grouping symbols above are missing at khan, that's their oversight. :cool:
4 replies | 225 view(s)
• 08-17-2017, 03:57 PM
Factor ax + 15x. You'll then see the quantity multiplying x as a binomial expression. As b is a constant, think of the binomial expression b - 7...
8 replies | 316 view(s)
• 08-17-2017, 03:23 PM
What is the volume of a solid sphere with radius 6 meters? That's the volume of the wire, too. Think of the wire as a very long cylinder. Use...
10 replies | 362 view(s)
• 08-17-2017, 03:12 PM
This question could be better-worded. I'm thinking that the building is a cylinder resting on its circular base, and that the staircase winds it's...
10 replies | 362 view(s)
• 08-17-2017, 03:00 PM
The base of a cube is a square. The base of your cone is a circle. What is the radius of the largest circle that will fit inside a square...
10 replies | 362 view(s)
• 08-17-2017, 02:55 PM
The formula for percent change is: (NewAmount - OriginalAmount) / OriginalAmount As you were not given the value of the original radius or...
10 replies | 362 view(s)
• 08-17-2017, 02:38 PM
You can, if you access image software (like MS Paint) that rotates images. The server does not alter the orientation of image files. The images...
10 replies | 362 view(s)
• 08-17-2017, 02:02 PM
Agree!! I would add it to my list -- if I could find the darn thing.
11 replies | 390 view(s)
• 08-17-2017, 01:44 AM
I don't think you're missing anything, Jeff. You finished one way; stapel finished a different way. Both methods lead to the same solutions. By...
11 replies | 390 view(s)
• 08-16-2017, 06:35 PM
It's the units which are squared or cubed, not the measurement itself. Area = L × W The units for measuring area are square units. It's common...
2 replies | 142 view(s)
• 08-16-2017, 06:18 PM
You divided by log_4(X), without knowing its value. If you choose to divide by a symbolic number, then you have already decided that it does not...
11 replies | 390 view(s)
• 08-16-2017, 05:58 PM
I cannot recommend the cymath site. Their software seems confused by certain expressions using standard Function Notation, and cymath sometimes...
4 replies | 226 view(s)
• 08-16-2017, 05:47 PM
Yes. This is one of the special factoring patterns; it's called a "Difference of Squares". y^2 - x^2 = (y + x)(y - x) Your graph ought to have...
3 replies | 203 view(s)
• 08-16-2017, 02:18 AM
Have you studied Geometric Progressions and how to sum a beginning number of terms in such a progression? tkhunny gave you a good hint: If 8000...
4 replies | 306 view(s)
• 08-16-2017, 02:01 AM
That's partially correct. We're concatenating "I" and "a" with those 124 two-letter words, but also with the two 2-character strings "Ia" and "II"...
3 replies | 619 view(s)
• 08-15-2017, 11:31 PM
That 2 is a typo, yes? I agree with you, that y=x^2/y means y^2=x^2, but that doesn't lead to just y=x. What kind of values did you substitute?...
3 replies | 203 view(s)
• 08-15-2017, 06:30 PM
If you're asking whether we need to add only 30 min to the flying time, then the answer to your question is, "Yes". The plane makes only one stop,...
13 replies | 654 view(s)
• 08-15-2017, 02:07 AM
I think the plane stops only once (halfway through the 2000 km trip). :cool:
13 replies | 654 view(s)
• 08-15-2017, 01:41 AM
You're on the right track, for using the Factor by Grouping Method. 2y^2 + 3y - 27 We multiply A*C = -54 We look for factors of -54 that sum...
4 replies | 239 view(s)
• 08-14-2017, 06:32 PM
That phrase seems ambiguous. Here's a set of numbers: 111, 444, 777 Here's another set of numbers: 147, 471, 714 If the author was trying to...
3 replies | 261 view(s)
• 08-14-2017, 12:52 AM
Question #16 requires one arithmetic step: reduce the given ratio (3/12) to lowest terms. Do you know how to do that? :cool:
13 replies | 654 view(s)
• 08-12-2017, 03:51 AM
Write a second letter to cut trees! (4)
0 replies | 220 view(s)
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