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K
ksdhart2
replied to the thread
Match the post#
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0 + 123 + 4 \cdot 5 \cdot 6 \cdot 7 + 89 = 1052 987 + 6 + 54 + 3 + 2 \cdot 1 + 0 = 1052
Mar 26, 2019
Dr.Peterson
replied to the thread
Ignore Currencies? Percentage Question (to work out total achievement, must all figs be in 1 currency?)
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Yes, you have to convert the currencies to one standard, because their relative amounts determine the weighting of the average. For...
Mar 26, 2019
R
Ryan$
replied to the thread
Sin/Cos periodic 2*pi: I'm getting confused about how sin(x)=sinx(x + (2*pi)) why is that?
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guys I really need help, why sinx(x)=sin(x+2*pi) ? argument aren't the same so how at specific x we get the same value of two functions?!
Mar 26, 2019
R
Ryan$
replied to the thread
Sin/Cos periodic 2*pi: I'm getting confused about how sin(x)=sinx(x + (2*pi)) why is that?
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but once again, isn't necessary for two function like sinx and sin(x+180) to have same argument for saying that two functons are the...
Mar 26, 2019
J
jen.jen302
posted the thread
Geometry Lesson: "Imagine you have been called as an expert witness in a court case...."
in
Geometry and Trig
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Hi, I am having some trouble with my geometry lesson. The question is: Imagine you have been called as an expert witness in a court...
Mar 26, 2019
D
Denis
replied to the thread
Is this algebra? [burger]+[burger]=30, [fries]+[fries]+[fries]=15, [drop]+[drop]+[drop]+[drop]=16, and then...
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SAME as : 2a = 30, 3b = 15, 4c = 16 ; a+b+c = ? HOKAY?
Mar 26, 2019
D
Denis
replied to the thread
where did this term go?
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Become an "expert": https://www.mathsisfun.com/algebra/completing-square.html
Mar 26, 2019
D
Denis
posted the thread
Today's rebus
in
Math Odds & Ends
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|--------| | Feb.29 | Sunday |--------| (5 words)
Mar 26, 2019
B
Barbados5
posted the thread
Ignore Currencies? Percentage Question (to work out total achievement, must all figs be in 1 currency?)
in
Arithmetic
.
Hi, A sales person has targets & sales in three countries with their own currencies. The sales persons achievement in each country can...
Mar 26, 2019
MarkFL
replied to the thread
Telescoping sums
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Okay, having proved the given identity, then we know...
Mar 26, 2019
pka
replied to the thread
Given integers a, b > 0, a + b = 1, show 1/(ab) + 1/(a^2 + b^2) >= 6
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If \{a,b\}\subseteq\mathbb{Z}^+ then a+b\ne 1. Please correct your post.
Mar 26, 2019
Dr.Peterson
replied to the thread
Given integers a, b > 0, a + b = 1, show 1/(ab) + 1/(a^2 + b^2) >= 6
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Please show what you've tried, and where you are stuck, as always! We want to help you with what you really need, not just what we...
Mar 26, 2019
Dr.Peterson
replied to the thread
Modulus theory: If d|n+1 and d|n^2+2, show that d|3; If n=3m, then gcd(n+1,n^2+2)=1.
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I've corrected your Latex above; don't use $, and use the [ MATH ] around the entire expression, not individual symbols. What you have...
Mar 26, 2019
J
JeffM
replied to the thread
A person sold a chair at a loss of 20%. If he had sold it for Rs 50 more, he would have gained 5%. Find the cost price of the chair.
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This is not advanced math. This is beginning algebra. PLEASE post in the proper category. Also, you need to read...
Mar 26, 2019
Dr.Peterson
replied to the thread
where did this term go?
.
Have you learned how to complete the square in a case with numerical coefficients, like x^2 - 6x + 4 = 0? That's an important skill, and...
Mar 26, 2019
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