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#101 Re: Help Me ! » Tricky or Lengthy Word Problems » 2023-11-14 14:52:18
sologuitar wrote:1. This is easier said than done under time pressure.
didnt know you are taking a timed test
srysologuitar wrote:3. You appear to be a math person. You know, we all make errors or ask "dumb" questions except you. I didn't know I was interacting with God.
sry
i know i never said i was god
when/where did i say i never made mistakes?
(cuz i make loads of them!)sologuitar wrote:4. Sincerely, if you are going to respond to all my questions with a chip on your shoulder, then kindly ignore my math questions.
sry
can you give example of me being rude and hostile or whatever?
then maybe i can figure out how to chat without offending you
thnx
Just answer the questions posted and keep your text math-related.
#102 Re: Help Me ! » Tricky or Lengthy Word Problems » 2023-11-14 10:40:25
harpazo1965 wrote:What is the best way to solve tricky or lengthy word problems?
e_jane_aran wrote:Take your time, and be clear on your reasoning. Otherwise, it's just a matter of practice, practice, practice.
sologuitar wrote:Practice without understanding leads to zero learning.
i think thats what she probly meant by 'be clear on your reasoning'
if you are 'clear' on the what/why then you can maybe better come up with the how
1. This is easier said than done under time pressure.
2. I am not a classroom student. My days as a classroom student ended in December 1993. This is why I am asking questions that I should have asked back in my school days.
3. You appear to be a math person. You know, we all make errors or ask "dumb" questions except you. I didn't know I was interacting with God. Ha!!
4. Sincerely, if you are going to respond to all my questions with a chip on your shoulder, then kindly ignore my math questions.
#103 Re: Help Me ! » Square Root Raised to Square Root » 2023-11-14 10:33:36
e_jane_aran wrote:Use technology to obtain a decimal approximation. That is, use your calculator or an online resource such as Wolfram Alpha:
https://www.wolframalpha.com/input?i2d=true&i=Power%5B%5C%2840%29Sqrt%5B2%5D%5C%2841%29%2CSqrt%5B2%5D%5D
sologuitar wrote:Is there an algebraic way to simplify this stuff?
don't think so
if wolfram alpha cant come up with an exact ans then you and me probably cant either
Again, just a question. No need to belittle anyone for asking questions that maybe others are hesitant to ask.
#104 Re: Help Me ! » Company's Profit or Loss » 2023-11-14 10:31:48
sologuitar wrote:Company X sold 1,500 units of its product for $9 each and 750 units for $6 each. If the company's cost of producing each unit of the product was $7, what was the company's profit or loss on the sale of 2,250 units?
So, 1,500 units at $9 each = $13,500.
Also, 750 units at $6 each = $4,500.
This together = $18,000.Also 2250 units at $7 each = $15, 750.
The company's profit or loss is the confusing part for me.
profit is income less outgo
profit is revenue minus costs
so subtract
Subtract what? It cannot be 18,000 - 15,750, right?
#105 Re: Help Me ! » Completing the Square » 2023-11-14 10:28:43
sologuitar wrote:Please, read what I said to Bob. This is not my own created problem. Understand? I found it online.
look at timestamps
she was probably writing response at same time so bobs wasn't visible to her yet
alos dont see how anyone coudl have know source of prob?
sry
where online?
url?
I think the site is called Quora.
#106 Re: Help Me ! » Square Root • Square Root » 2023-11-14 10:27:23
sologuitar wrote:Why does a square • square root = radicand?
For example: sqrt{ x } • sqrt{ x } = x
what else could it be?
(i'm not being flip)
(im asking what math could make it be anything else?)its just like 1 - 1 + 1 = 1 or 2*3/3 = 2
subtracting undoes adding
dividing undoes multiplying
squaring undoes square-rooting
This is a self-study, a visit to material learned more than 20 years ago.
No question is dumb. It is simply a question. No need to belittle anyone.
#107 Re: Help Me ! » Border of Circular Swimming Pool » 2023-11-14 10:24:33
looking forward to seeing the answer.
Bob provided the needed equation to find x, which represents the width of the border. Used Wolfram to find x.
Here it is again:
pi((5 + x)^2 - 5^2)(1/4) = 27
#108 Re: Help Me ! » Exponent Quotient Rule » 2023-11-14 10:19:58
yes, that's correct.
Thanks. You know, reviewing basic material before moving on with the textbook. The best thing about self-study is the fact that I don't need to rush through th material for an exam.
#109 Re: Help Me ! » Border of Circular Swimming Pool » 2023-11-14 03:36:15
I think Bob's last post was meant for me. I am not a mathematician and admit I am not following the formula too well and was simply interested in finding the answer to the problem set by sologuitar. i.e. what is the width of the border? Thanks
Thanks for letting me know.
#110 Re: Help Me ! » Raise to the Square Three Times » 2023-11-14 03:33:47
Yes I can. Apologies for a lot of very short responses but there were a lot of them to get through.
Bob
1. Thanks for changing my username.
2. If questions are easy, I will post several problems.
3. If questions are harder, I will post fewer problems.
#111 Re: Help Me ! » Exponent Addition Rule » 2023-11-14 03:27:36
correct
No middle ground when it comes to mathematics. We either like it or not.
#112 Re: Help Me ! » Probability of Die and Coin » 2023-11-14 03:26:13
correct
So, for the probability of AND questions we multiply.
For the probability of OR questions we add.
#113 Re: Help Me ! » Probability of No Rain » 2023-11-14 03:24:12
yes
I struggle greatly with probability problems. I hope to overcome this set back in my future self-study of basic probability.
#114 Re: Help Me ! » How Many Marbles Are Left? » 2023-11-14 03:22:28
yes
Good. Another problem solved. Another one to boast about.
#115 Re: Help Me ! » Completing the Square » 2023-11-14 03:21:15
Oh. Odd question then. Out of place in a completing the square chapter.
Bob
I find many OUT OF CHAPTER problems in math textbooks.
#116 Re: Help Me ! » Raise to the Square Three Times » 2023-11-13 20:48:18
Yes, I believe the rule is work the powers backwards like you have done.
ie not (2^3)^ 5 which yields a different answer.
Bob
Cool.
Question:
Can you please change my username here to sologuitar?
You see, I am a guitarist.
#117 Help Me ! » Exponent Quotient Rule » 2023-11-13 20:46:11
- sologuitar
- Replies: 2
I know that (a^b)/(a^c) = a^(a - c). We keep the same base and subtract exponents.
Can I say that (10^(x + y))/(10^(x - y)) = 10^(x + y -(x - y))?
If so, then 10^(x + y - x + y) leads to 10^(y + y).
I finally get 10^(2y).
You say?
#118 Help Me ! » Exponent Addition Rule » 2023-11-13 19:40:27
- sologuitar
- Replies: 2
If we multiply two factors with the same base, we keep the same base and simply add the exponents.
Say, a^4 • a^7 = a^(4 + 7) = a^11.
What if the exponents are variables?
Say, 5^(x + y) • 5^(2x + 3y).
I keep base 5 and add the exponents.
Yes?
So, 5^(x + y + 2x + 3y) = 5^(3x + 4y).
You say?
#119 Help Me ! » Company's Profit or Loss » 2023-11-13 19:32:12
- sologuitar
- Replies: 12
Company X sold 1,500 units of its product for $9 each and 750 units for $6 each. If the company's cost of producing each unit of the product was $7, what was the company's profit or loss on the sale of 2,250 units?
Let me see.
So, 1,500 units at $9 each = $13,500.
Also, 750 units at $6 each = $4,500.
This together = $18,000.
Also 2250 units at $7 each = $15, 750.
The company's profit or loss is the confusing part for me.
Must I add $18,000 and $15,750 to show the company's profit?
Stuck here....
#120 Help Me ! » Probability of Die and Coin » 2023-11-13 19:15:51
- sologuitar
- Replies: 4
A die is rolled and then a coin is tossed. What is the probability that the die shows an even number AND the coin shows a tail?
Let me see.
Probability questions are a bit fuzzy.
A die has digits 1 to 6. I know that 3/6 or 1/2 are even numbers.
P(even an even number) = 3/6 = 1/2.
P(coin shows a tail) = 1/2
P(even number AND tail) = (1/2)(1/2) or 1/4.
You say?
#121 Help Me ! » Probability of No Rain » 2023-11-13 18:54:44
- sologuitar
- Replies: 2
There's a 30% chance of rain tomorrow. What is the probability of no rain tomorrow?
Let me see.
I know that 30% = 0.30 as a decimal.
Let P = probability
P(no rain) = 1 - P(rain)
P(no rain) = 1 - 0.30
P(no rain) = 0.70
P(no rain) = 70%
You say?
#122 Help Me ! » How Many Marbles Are Left? » 2023-11-13 18:47:30
- sologuitar
- Replies: 2
Rita has two boxes of 300 marbles. From Box A she gave away x marbles.
From Box B she gave away y marbles. How many marbles does Rita have left?
Let me see.
There are 600 marbles in all (two boxes with 300 marbles in each box).
Rita gave away x marbles from Box A and y marbles from Box B.
So, in all she gave away (x + y) marbles.
I say that the total number of marbles Rita has left is
600 - (x + y).
You say?
#123 Help Me ! » Square Root • Square Root » 2023-11-13 18:39:03
- sologuitar
- Replies: 2
Why does a square • square root = radicand?
For example:
sqrt{ x } • sqrt{ x } = x
Why?
#124 Re: Help Me ! » Square Root Raised to Square Root » 2023-11-13 13:52:40
harpazo1965 wrote:How do you [evaluate or simplify] a square root raised to another square root?
What is sqrt{2}^(sqrt{2})?
Use technology to obtain a decimal approximation. That is, use your calculator or an online resource such as Wolfram Alpha:
https://www.wolframalpha.com/input?i2d=true&i=Power%5B%5C%2840%29Sqrt%5B2%5D%5C%2841%29%2CSqrt%5B2%5D%5D
Copy. Will do. Is there an algebraic way to simplify this stuff?
#125 Re: Help Me ! » Square Root Raised to Square Root » 2023-11-13 13:51:13
This shouldn't have an 'x' in it. 1.414^1.414 ≈ 1.6225
Bob
Another problem found online. I am not in the business of making up my own problems. I try solving problems created by others, particularly math teachers.
I have 2 math textbooks. I going to buy a Calculus textbook that covers Calculus l, ll, and lll for future self-study. In fact, I will purchase one this coming payday.