Assignmentgeek Q&A - Recent questions and answers in Math
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Powered by Question2AnswerAnswered: How do I prove or disprove this matrix identity?
https://assignmentgeek.com/qa/145/how-do-i-prove-or-disprove-this-matrix-identity?show=159#a159
<p>Here is a <span style="font-size:108%"><span style="font-family:mathjax_main">2</span><span style="font-family:mathjax_main">×</span><span style="font-family:mathjax_main">2</span></span> counterexample, easily extendable to <span style="font-size:108%"><em>n</em><span style="font-family:mathjax_main">×</span><em>n</em></span>: Let <span style="font-size:108%"><em>A</em></span> orthogonally project onto one axis, and let <span style="font-size:108%"><em>B</em></span> rotate the plane by <span style="font-size:108%"><span style="font-family:mathjax_main">90</span><span style="font-family:mathjax_main; font-size:70.7%">∘</span></span>. The operation of <span style="font-size:108%"><em>A</em><em>B</em><em>A</em></span> is to collapse everything down to one axis, then turn that axis, then collapse that axis down to the origin. However, <span style="font-size:108%"><em>A</em><span style="font-family:mathjax_main; font-size:70.7%">2</span><span style="font-family:mathjax_main">=</span><em>A</em><span style="font-family:mathjax_main">≠</span><span style="font-family:mathjax_main">0</span></span></p><p>visit: <a rel="nofollow" href="https://www.fastcustomessaywriting.com/">custom essay writing service</a></p>Mathhttps://assignmentgeek.com/qa/145/how-do-i-prove-or-disprove-this-matrix-identity?show=159#a159Wed, 23 Aug 2017 06:22:53 +0000Answered: help me set up an equation for this problem
https://assignmentgeek.com/qa/154/help-me-set-up-an-equation-for-this-problem?show=157#a157
x represents the number of comic books to start<br />
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x - 0.5x + 14 = 28Mathhttps://assignmentgeek.com/qa/154/help-me-set-up-an-equation-for-this-problem?show=157#a157Mon, 21 Aug 2017 08:07:02 +0000Answered: How do you write an equation for a graph
https://assignmentgeek.com/qa/127/how-do-you-write-an-equation-for-a-graph?show=130#a130
Seems your question isn't full of information, please provide more details, so we can answer it.<br />
Thank you!Mathhttps://assignmentgeek.com/qa/127/how-do-you-write-an-equation-for-a-graph?show=130#a130Wed, 16 Aug 2017 04:34:05 +0000finding average high temperature
https://assignmentgeek.com/qa/125/finding-average-high-temperature
The monthly average high temperature, y, in degrees Fahrenheit at Phoenix, Arizona, can be modeled by y = 20.3sin(0.53x−2.18) + 83.8 where x = 1 corresponds to January, x = 2 corresponds to February, and so on. Estimate numerically when the monthly average high temperature is 93◦ F.Mathhttps://assignmentgeek.com/qa/125/finding-average-high-temperatureTue, 08 Aug 2017 06:56:22 +0000consecutive integers question
https://assignmentgeek.com/qa/121/consecutive-integers-question
Find the two consecutive integers such that the sum of the greatest integer and twice the lesser integer is 40Mathhttps://assignmentgeek.com/qa/121/consecutive-integers-questionMon, 07 Aug 2017 04:55:26 +0000Answered: Need solution to the system of equations
https://assignmentgeek.com/qa/118/need-solution-to-the-system-of-equations?show=119#a119
<p><span style="font-size:14px">oh, it's quite simple </span></p><p><span style="font-size:14px">we need to get x from one of <span style="font-family:helvetica,arial,sans-serif">equation, so </span></span><span style="font-family: helvetica, arial, sans-serif;"><span style="font-size:14px">x-2 = -x-4</span></span></p><p><span style="font-family: helvetica, arial, sans-serif;"><span style="font-size:14px">then 2x=-2</span></span></p><p><span style="font-family: helvetica, arial, sans-serif;"><span style="font-size:14px">x = - 1<br>after that we put x into </span></span><span style="font-family:helvetica,arial,sans-serif; font-size:14px">y=x-2 and get y = - 3</span></p><p><span style="font-family:helvetica,arial,sans-serif; font-size:14px">Answer: -3 </span><br> </p>Mathhttps://assignmentgeek.com/qa/118/need-solution-to-the-system-of-equations?show=119#a119Fri, 04 Aug 2017 12:44:26 +0000Answered: permutation and combination
https://assignmentgeek.com/qa/109/permutation-and-combination?show=110#a110
5P3 is an example of nCr which is DEFINED as n! / (n-r)!<br />
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In this case, 5! / 2! has the 5•4•3 expansion...it's 5! but with the 2•1 having cancelled the last two factors of 5!<br />
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Answer 60 is entirely correct.Mathhttps://assignmentgeek.com/qa/109/permutation-and-combination?show=110#a110Tue, 01 Aug 2017 11:36:42 +0000Answered: calculate the area of the trapezoid
https://assignmentgeek.com/qa/100/calculate-the-area-of-the-trapezoid?show=101#a101
Area = 1/2 * height * ( top + bottom)<br />
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You have four dimensions listed. Based on the<br />
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list of possible answers <br />
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Area = 1/2 * 14.3 * ( 20 + 10) = 214.5<br />
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is the only one that works.Mathhttps://assignmentgeek.com/qa/100/calculate-the-area-of-the-trapezoid?show=101#a101Mon, 31 Jul 2017 11:02:33 +0000Answered: What is t(s(3)???
https://assignmentgeek.com/qa/60/what-is-t-s-3?show=67#a67
<p><span style="text-decoration: underline;">t[sx)] can be evaluated by replacing x with s(x) in the equation for t(x).</span></p><p>t[s(x)] = 2[s(x)]<sup>2</sup> + 2</p><p> = 2(-x-1)<sup>2</sup> + 2 {Replacing s(x) with -x -1}</p><p>So</p><p>t[s(3)] = 2(-3-1)<sup>2</sup> + 2 {Substitute 3 for x}</p><p> = 2(-4)<sup>2</sup> + 2</p><p> = 34</p><p>Or</p><p>s(3) = -3 -1 = -4</p><p>t[s(3)] = 2[-4]<sup>2</sup> + 2</p><p> = 34</p><p></p>Mathhttps://assignmentgeek.com/qa/60/what-is-t-s-3?show=67#a67Thu, 20 Jul 2017 10:09:59 +0000Algebra help! Need to rearrange an equation
https://assignmentgeek.com/qa/63/algebra-help-need-to-rearrange-an-equation
I've got a formula (y-b) / (0-b) = (x-0) / (a-0)<br />
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How can it be rearranged to<br />
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x / a + y / b = 1 ?<br />
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Hope, you'll help me! Thanks!Mathhttps://assignmentgeek.com/qa/63/algebra-help-need-to-rearrange-an-equationThu, 20 Jul 2017 08:49:08 +0000Prove that: Trigonometry Question
https://assignmentgeek.com/qa/56/prove-that-trigonometry-question
prove that (1+sinA)²+(1-sinA)²/cos²Α=2(1+sin²Α/1-sin²Α)Mathhttps://assignmentgeek.com/qa/56/prove-that-trigonometry-questionWed, 19 Jul 2017 11:21:12 +0000Answered: Geometry --Triangle -- Need help
https://assignmentgeek.com/qa/43/geometry-triangle-need-help?show=52#a52
It is the centroid of a triangle.Mathhttps://assignmentgeek.com/qa/43/geometry-triangle-need-help?show=52#a52Wed, 19 Jul 2017 10:32:57 +0000Answered: Math Calculus --- AID---
https://assignmentgeek.com/qa/27/math-calculus-aid?show=31#a31
Total time spent: 4 hours 15 minutes (it is equivalent to 255 minutes). Let the flight time from Paris to Glasgow be X. Then the flight time from Glasgow to Paris will be (X+10).<br />
We have an equation with one unknown variable:<br />
X + 45 + (X+10) = 255 ⇒ X = 100<br />
So the flight time from Paris to Glasgow is 100 minutes. If the plane leaves Paris at 08:50 then it will be in Glasgow at 10:30.<br />
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Answer: 10:30Mathhttps://assignmentgeek.com/qa/27/math-calculus-aid?show=31#a31Mon, 17 Jul 2017 07:30:41 +0000Answered: How to solve? Math help !URGENT!
https://assignmentgeek.com/qa/29/how-to-solve-math-help-urgent?show=30#a30
Solution:<br />
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Let the three numbers be x, y and z.<br />
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Sum of the numbers is 98.<br />
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x + y + z = 98………………(i)<br />
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The ratio of the first to the second is 2/3.<br />
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x/y = 2/3.<br />
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x = 2/3 × y.<br />
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x = 2y/3.<br />
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The ratio of the second to the third is 5/8.<br />
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y/z = 5/8.<br />
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z/y = 8/5.<br />
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z = 8/5 × y.<br />
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z = 8y/5.<br />
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Put the value of x = 2y/3 and z = 8y/5 in (i).<br />
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2y/3 + y + 8y/5 = 98<br />
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49y/15 = 98.<br />
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49y = 98 × 15.<br />
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49y = 1470.<br />
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y = 1470/49.<br />
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y = 30 .<br />
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Therefore, the second number is 30.<br />
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Answer: СMathhttps://assignmentgeek.com/qa/29/how-to-solve-math-help-urgent?show=30#a30Mon, 17 Jul 2017 07:29:29 +0000Answered: The side length is___ units?
https://assignmentgeek.com/qa/1/the-side-length-is___-units?show=6#a6
<p>good to have such q&a <br>now we can get help from experts and other members! and it's really fast. I hope I get my answer shortly<br><br>yeap)<br>the answer is 17.<br><span style="background-color:rgb(241, 247, 243); font-family:helvetica,arial,sans-serif; font-size:14px">51/3 = 17</span></p>Mathhttps://assignmentgeek.com/qa/1/the-side-length-is___-units?show=6#a6Tue, 11 Jul 2017 11:03:50 +0000