Ask PinoyBIX Engineering - Recent questions and answers in Math
https://ask.pinoybix.org/qa/math
Powered by Question2AnswerThe rest are children who like to watch cartoons only. How many of the TV viewers are children?
https://ask.pinoybix.org/5518/rest-children-like-watch-cartoons-only-many-viewers-children
a survey concerning a group of TV viewers shows that: 56% watch sport; 39% watch movies; 51% watch news; 16% watch sports & movies; 19% watch movies & news; 30% watch sports & news; 11% watch sports, movies & news. The rest are children who like to watch cartoons only. How many of the TV viewers are children?Mathhttps://ask.pinoybix.org/5518/rest-children-like-watch-cartoons-only-many-viewers-childrenFri, 26 Oct 2018 16:45:42 +0000cot 315° - sec 120° + cos (-240°) =
https://ask.pinoybix.org/4938/cot-315%C2%B0-sec-120%C2%B0-cos-240%C2%B0
cot 315° - sec 120° + cos (-240°) =Mathhttps://ask.pinoybix.org/4938/cot-315%C2%B0-sec-120%C2%B0-cos-240%C2%B0Thu, 11 Oct 2018 02:33:19 +0000cot 315° - sec 120° + cos (-240°) =
https://ask.pinoybix.org/4937/cot-315%C2%B0-sec-120%C2%B0-cos-240%C2%B0
<p>Which of the following relation is true for any angle θ?</p><table style="width:684px"><tbody><tr><td style="vertical-align:top; width:12px"></td><td>sec (-θ) = sec θ</td></tr></tbody></table><table style="width:684px"><tbody><tr><td style="vertical-align:top; width:12px"></td><td>tan (-θ) = tan θ</td></tr></tbody></table><table style="width:684px"><tbody><tr><td style="vertical-align:top; width:12px"></td><td>csc (-θ) = csc θ</td></tr></tbody></table><table style="width:684px"><tbody><tr><td style="vertical-align:top; width:12px"></td><td>sin (-θ) = sin θ</td></tr></tbody></table>
Mathhttps://ask.pinoybix.org/4937/cot-315%C2%B0-sec-120%C2%B0-cos-240%C2%B0Thu, 11 Oct 2018 02:33:02 +0000If tan θ = √3, θ in quadrant III, find the value of (1+cos θ) / (1-cos θ)
https://ask.pinoybix.org/4934/if-tan-%CE%B8-%E2%88%9A3-%CE%B8-in-quadrant-iii-find-the-value-of-1-cos-%CE%B8-1-cos-%CE%B8
Mathhttps://ask.pinoybix.org/4934/if-tan-%CE%B8-%E2%88%9A3-%CE%B8-in-quadrant-iii-find-the-value-of-1-cos-%CE%B8-1-cos-%CE%B8Thu, 11 Oct 2018 02:16:53 +0000Charlie wishes to bequeath his youngest son P200,000 ten years from now.
https://ask.pinoybix.org/4766/charlie-wishes-bequeath-his-youngest-son-p200-000-years-from
Charlie wishes to bequeath his youngest son P200,000 ten years from now. What amount should he invest now if it will earn interest of 6% compounded annually during the first 5 years and 8% compounded quarterly during the next 5 years?Mathhttps://ask.pinoybix.org/4766/charlie-wishes-bequeath-his-youngest-son-p200-000-years-fromSat, 06 Oct 2018 16:41:12 +0000An employee has a promissory note, due 5 years hence, whose maturity value is P70,000.
https://ask.pinoybix.org/4765/employee-promissory-note-years-hence-whose-maturity-value
An employee has a promissory note, due 5 years hence, whose maturity value is P70,000. If the rate of interest is 12% compounded semi-annually, what is the value of this note now?Mathhttps://ask.pinoybix.org/4765/employee-promissory-note-years-hence-whose-maturity-valueSat, 06 Oct 2018 16:39:38 +0000solving Problem: How much is left in the account one year after the purchase?
https://ask.pinoybix.org/4350/solving-problem-how-much-left-the-account-year-after-purchase
You deposit P1000 into a 9% account today. At the end of two years, you will deposit another P3,000. In five years, you plan a P4000 purchase. How much is left in the account one year after the purchase?Mathhttps://ask.pinoybix.org/4350/solving-problem-how-much-left-the-account-year-after-purchaseThu, 12 Jul 2018 10:13:07 +0000Solving Problem: Find the amount of the following payments
https://ask.pinoybix.org/4349/solving-problem-find-the-amount-of-the-following-payments
Find the amount of the following payments at the end of 5th year. P3,000 at the end of 1st year, P4,500 at the end of 2nd year and P6,000 at the end of 4th year if money worth 12% per annum.Mathhttps://ask.pinoybix.org/4349/solving-problem-find-the-amount-of-the-following-paymentsThu, 12 Jul 2018 10:11:15 +0000Find the cash price of a gem which has bought in installment basis
https://ask.pinoybix.org/4348/find-the-cash-price-of-gem-which-has-bought-installment-basis
Find the cash price of a gem which has bought in installment basis that requires a down payment of 50000 and payment of 30000 after 1year 40000 after 2yrs and a final payment of 76374.34 after 4yrs at a rate of 15% per annum.Mathhttps://ask.pinoybix.org/4348/find-the-cash-price-of-gem-which-has-bought-installment-basisThu, 12 Jul 2018 10:09:12 +0000a tank contains 800litres of water with which 200g of salt is dissolved.
https://ask.pinoybix.org/4342/tank-contains-800litres-water-with-which-200g-salt-dissolved
A tank contains 800litres of water with which 200g of salt is dissolved. 2 liters of fresh water runs in per minute and 2 liters of the mixtures in the tank kept uniform by the stirring runs out at the same rate. after 5hrs how much salt is left.Mathhttps://ask.pinoybix.org/4342/tank-contains-800litres-water-with-which-200g-salt-dissolvedMon, 09 Jul 2018 23:25:39 +0000beginning with 1, how many consecutive odd integers should be added to obtain the sum of 441
https://ask.pinoybix.org/4340/beginning-with-many-consecutive-integers-should-added-obtain
pasagot pleaseMathhttps://ask.pinoybix.org/4340/beginning-with-many-consecutive-integers-should-added-obtainWed, 04 Jul 2018 17:46:15 +0000Answered: What is Acceleration derivative?
https://ask.pinoybix.org/4112/what-is-acceleration-derivative?show=4113#a4113
<p style="text-align: justify;"><strong>Acceleration derivative</strong> is the <a rel="" href="https://ask.pinoybix.org/1425/what-is-acceleration">acceleration</a> (a) expressed as the second derivative of distance (s) with respect to time (t): a equals d<sup>2</sup>s/dt<sup>2</sup>.</p>
Mathhttps://ask.pinoybix.org/4112/what-is-acceleration-derivative?show=4113#a4113Fri, 23 Mar 2018 08:31:10 +0000the volume of the sphere is 904.78 cu.m. find the volume of the spherical segment of height 4m.
https://ask.pinoybix.org/3918/volume-sphere-find-the-volume-the-spherical-segment-height
Mathhttps://ask.pinoybix.org/3918/volume-sphere-find-the-volume-the-spherical-segment-heightTue, 20 Mar 2018 07:22:06 +0000Answered: A boat man rows to a place 4.8 miles with the stream and back in 14 hours, Find the rate of the stream.
https://ask.pinoybix.org/115/boat-rows-place-miles-with-stream-back-hours-find-rate-stream?show=3917#a3917
<p><span style="color:rgb(112, 112, 112); font-family:raleway,verdana,geneva,sans-serif; font-size:16px">The rate of the stream is </span><strong>0.76 mph</strong><span style="color:rgb(112, 112, 112); font-family:raleway,verdana,geneva,sans-serif; font-size:16px">.</span></p>
Mathhttps://ask.pinoybix.org/115/boat-rows-place-miles-with-stream-back-hours-find-rate-stream?show=3917#a3917Tue, 20 Mar 2018 07:20:44 +0000Answered: what is the specific gravity of a mixture with a density of 82.04 lb/ft3
https://ask.pinoybix.org/3910/what-is-the-specific-gravity-of-mixture-with-density-of-82-ft3?show=3914#a3914
SG = rho of subs ÷ rho of water<br />
Constant: <br />
rho of water = 64.4 lb/ft3<br />
SG = 82.04 lb/ft3 ÷ 64.4 lb/ft3<br />
SG = 1.27Mathhttps://ask.pinoybix.org/3910/what-is-the-specific-gravity-of-mixture-with-density-of-82-ft3?show=3914#a3914Sat, 03 Mar 2018 03:26:49 +0000the directed line segment from (-2,3) to (5,10) is extended by its own length, Find the terminal point nearer P1.
https://ask.pinoybix.org/3912/directed-line-segment-extended-length-terminal-point-nearer
Mathhttps://ask.pinoybix.org/3912/directed-line-segment-extended-length-terminal-point-nearerWed, 21 Feb 2018 12:44:27 +0000The equation of the line with a slope 47 and y-intercept -2 is
https://ask.pinoybix.org/3908/the-equation-of-the-line-with-a-slope-47-and-y-intercept-2-is
Mathhttps://ask.pinoybix.org/3908/the-equation-of-the-line-with-a-slope-47-and-y-intercept-2-isTue, 06 Feb 2018 13:47:39 +0000What is the area bounded by the curve y^2 = 8x and x^2 = 16y?
https://ask.pinoybix.org/3906/what-is-the-area-bounded-by-the-curve-y-2-8x-and-x-2-16y
Mathhttps://ask.pinoybix.org/3906/what-is-the-area-bounded-by-the-curve-y-2-8x-and-x-2-16yMon, 29 Jan 2018 14:16:51 +0000circles with fixed radius and tangent to the x-axis
https://ask.pinoybix.org/3905/circles-with-fixed-radius-and-tangent-to-the-x-axis
Mathhttps://ask.pinoybix.org/3905/circles-with-fixed-radius-and-tangent-to-the-x-axisSun, 28 Jan 2018 03:26:42 +0000Ce Board problem
https://ask.pinoybix.org/3904/ce-board-problem
Find the minimum amount of thin sheet that can be made into a closed cylinder having a volume of 125 cu.in square inches.Mathhttps://ask.pinoybix.org/3904/ce-board-problemSun, 14 Jan 2018 17:53:12 +0000Ce board problem
https://ask.pinoybix.org/3903/ce-board-problem
Mathhttps://ask.pinoybix.org/3903/ce-board-problemSun, 14 Jan 2018 17:49:00 +0000Can you help me with this guys ?
https://ask.pinoybix.org/3902/can-you-help-me-with-this-guys
<ul><li>An equipment installation job in the completion stage can be completed in 40 days of 8 hours of work per day with 40 men working. With the contract expiring in 30 days, the mechanical engineer contractor decided to add more men on the job, overtime not being permitted. If the liquidated damages is P2,000.00 per day of delay, and the men are paid P80.00 a day, will the engineer be able to complete the job on time?</li><li> Would he save money by adding more men? </li></ul><p></p>
Mathhttps://ask.pinoybix.org/3902/can-you-help-me-with-this-guysThu, 04 Jan 2018 00:46:56 +0000y=c1x^2 + c2e^-x
https://ask.pinoybix.org/3901/y-c1x-2-c2e-x
Mathhttps://ask.pinoybix.org/3901/y-c1x-2-c2e-xTue, 02 Jan 2018 07:12:45 +0000father wishes to provide P1,000,000 for his son on his son’s 21st birthday.
https://ask.pinoybix.org/3896/father-wishes-provide-000-000-for-his-son-sons-21st-birthday
<p><span style="color:rgb(97, 97, 97); font-family:roboto,helvetica neue,helvetica,arial,sans-serif; font-size:15px">A father wishes to provide P1,000,000 for his son on his son’s 21</span><span style="color:rgb(97, 97, 97); font-family:roboto,helvetica neue,helvetica,arial,sans-serif; font-size:11.25px">st</span><span style="color:rgb(97, 97, 97); font-family:roboto,helvetica neue,helvetica,arial,sans-serif; font-size:15px"> birthday. How much is his semi annual deposit in a special account that earns 5% compounded quarterly, if the first deposit was made when the son was 4 ½ years old</span></p>
Mathhttps://ask.pinoybix.org/3896/father-wishes-provide-000-000-for-his-son-sons-21st-birthdayMon, 11 Dec 2017 01:02:05 +0000Find the second eccentricity of the curve 9x^2 + 4y^2 - 36x - 8y + 4 = 0
https://ask.pinoybix.org/3815/find-the-second-eccentricity-of-the-curve-9x-2-4y-2-36x-8y-4-0
Find the second eccentricity of the curve 9x^2 + 4y^2 - 36x - 8y + 4 = 0Mathhttps://ask.pinoybix.org/3815/find-the-second-eccentricity-of-the-curve-9x-2-4y-2-36x-8y-4-0Thu, 16 Nov 2017 18:34:22 +0000What is Boolean Algebra?
https://ask.pinoybix.org/3590/what-is-boolean-algebra
What is Boolean Algebra?Mathhttps://ask.pinoybix.org/3590/what-is-boolean-algebraThu, 02 Nov 2017 18:50:17 +0000Answered: what part of 500 is 230?
https://ask.pinoybix.org/2754/what-part-of-500-is-230?show=3568#a3568
230/500 = 0.46 *100 = 46%Mathhttps://ask.pinoybix.org/2754/what-part-of-500-is-230?show=3568#a3568Thu, 02 Nov 2017 18:42:33 +0000Answered: What is the area bounded by the curve y^2 = x and the line x – 4 = 0?
https://ask.pinoybix.org/26/what-is-the-area-bounded-by-the-curve-y-2-x-and-the-line-x-4-0?show=3397#a3397
the area is equal to 32/3Mathhttps://ask.pinoybix.org/26/what-is-the-area-bounded-by-the-curve-y-2-x-and-the-line-x-4-0?show=3397#a3397Thu, 26 Oct 2017 14:46:48 +0000Answered: What is the area bounded by the curve y^2 = x and the line x – 4 = 0?
https://ask.pinoybix.org/37/what-is-the-area-bounded-by-the-curve-y-2-x-and-the-line-x-4-0?show=3396#a3396
area is equal to 32/3Mathhttps://ask.pinoybix.org/37/what-is-the-area-bounded-by-the-curve-y-2-x-and-the-line-x-4-0?show=3396#a3396Thu, 26 Oct 2017 14:46:00 +0000Answered: Find the area in the first quadrant bounded by the parabola y^2 = 4x, x = 1, and x = 3.
https://ask.pinoybix.org/34/find-the-area-the-first-quadrant-bounded-by-the-parabola-and?show=3395#a3395
the area is a = 5.595 sq ^ 2Mathhttps://ask.pinoybix.org/34/find-the-area-the-first-quadrant-bounded-by-the-parabola-and?show=3395#a3395Thu, 26 Oct 2017 14:43:31 +0000Answered: Find the area bounded by the parabola x^2 = 4y and y = 4.
https://ask.pinoybix.org/29/find-the-area-bounded-by-the-parabola-x-2-4y-and-y-4?show=3394#a3394
use the formula for the area of trapezoid <br />
<br />
a - 75 sq ^ 2Mathhttps://ask.pinoybix.org/29/find-the-area-bounded-by-the-parabola-x-2-4y-and-y-4?show=3394#a3394Thu, 26 Oct 2017 14:42:18 +0000Answered: Locate the centroid of the plane area bounded by the equation y^2 = 4x, x = 1 and the x-axis
https://ask.pinoybix.org/41/locate-the-centroid-the-plane-area-bounded-the-equation-axis?show=3393#a3393
the centroid is located at 3/5 and 3/4Mathhttps://ask.pinoybix.org/41/locate-the-centroid-the-plane-area-bounded-the-equation-axis?show=3393#a3393Thu, 26 Oct 2017 14:39:57 +0000Answered: Locate the centroid of the plane area bounded by y = x^2 and y = x.
https://ask.pinoybix.org/39/locate-the-centroid-of-the-plane-area-bounded-by-y-x-2-and-y-x?show=3392#a3392
the coordinate of the centroid is 0.5 and 0.4Mathhttps://ask.pinoybix.org/39/locate-the-centroid-of-the-plane-area-bounded-by-y-x-2-and-y-x?show=3392#a3392Thu, 26 Oct 2017 14:39:07 +0000Answered: Find the coordinates of the centroid of the plane area bounded by the parabola y = 4 – x^2 and the x-axis.
https://ask.pinoybix.org/40/find-coordinates-centroid-plane-area-bounded-parabola-axis?show=3391#a3391
the centroid is located ar point ( 0, 1.6)Mathhttps://ask.pinoybix.org/40/find-coordinates-centroid-plane-area-bounded-parabola-axis?show=3391#a3391Thu, 26 Oct 2017 14:35:32 +0000Answered: What is the integral of [(e^x – 1) / (e^x + 1)] dx?
https://ask.pinoybix.org/20/what-is-the-integral-of-e-x-1-e-x-1-dx?show=3390#a3390
= ln (e^x + 1)^2 - x + CMathhttps://ask.pinoybix.org/20/what-is-the-integral-of-e-x-1-e-x-1-dx?show=3390#a3390Thu, 26 Oct 2017 14:28:02 +0000Answered: Evaluate the integral of ln x dx, the limit are 1 and e.
https://ask.pinoybix.org/16/evaluate-the-integral-of-ln-x-dx-the-limit-are-1-and-e?show=3389#a3389
Using the basic formula in integral calculus, you will get answer 1Mathhttps://ask.pinoybix.org/16/evaluate-the-integral-of-ln-x-dx-the-limit-are-1-and-e?show=3389#a3389Thu, 26 Oct 2017 14:26:56 +0000Answered: Evaluate the integral of cos x dx limits from π/4 to π/2.
https://ask.pinoybix.org/15/evaluate-the-integral-of-cos-x-dx-limits-from-%CF%80-4-to-%CF%80-2?show=3388#a3388
the answer is .293Mathhttps://ask.pinoybix.org/15/evaluate-the-integral-of-cos-x-dx-limits-from-%CF%80-4-to-%CF%80-2?show=3388#a3388Thu, 26 Oct 2017 14:24:45 +0000Answered: What is the integral of cos x with respect to x?
https://ask.pinoybix.org/19/what-is-the-integral-of-cos-x-with-respect-to-x?show=3387#a3387
integ of cos = sin<br />
<br />
= sin X + CMathhttps://ask.pinoybix.org/19/what-is-the-integral-of-cos-x-with-respect-to-x?show=3387#a3387Thu, 26 Oct 2017 14:23:41 +0000Answered: What is the integral of (1 / (3x + 4)) with respect to x and evaluate the result from x = 0 and x = 2.
https://ask.pinoybix.org/12/what-integral-with-respect-and-evaluate-the-result-from-and?show=3386#a3386
USE THE INTEGRATION FORMULA AND YOU WILL GET THE ANSWER .305Mathhttps://ask.pinoybix.org/12/what-integral-with-respect-and-evaluate-the-result-from-and?show=3386#a3386Thu, 26 Oct 2017 14:22:39 +0000Answered: Evaluate the integral of (cos 3A)^8 dA from 0 to π/6.
https://ask.pinoybix.org/11/evaluate-the-integral-of-cos-3a-8-da-from-0-to-%CF%80-6?show=3385#a3385
the answer is 35 (3.1416) / 768Mathhttps://ask.pinoybix.org/11/evaluate-the-integral-of-cos-3a-8-da-from-0-to-%CF%80-6?show=3385#a3385Thu, 26 Oct 2017 14:21:02 +0000Answered: Evaluate the integral of sin^6 x dx from 0 to π/2.
https://ask.pinoybix.org/8/evaluate-the-integral-of-sin-6-x-dx-from-0-to-%CF%80-2?show=3384#a3384
if you use wallis formula you will get 5 r / 32Mathhttps://ask.pinoybix.org/8/evaluate-the-integral-of-sin-6-x-dx-from-0-to-%CF%80-2?show=3384#a3384Thu, 26 Oct 2017 14:19:47 +0000Answered: How long will it take each of them to finish the work alone?
https://ask.pinoybix.org/90/how-long-will-it-take-each-of-them-to-finish-the-work-alone?show=3383#a3383
it wiil take 10 days to finish the jobMathhttps://ask.pinoybix.org/90/how-long-will-it-take-each-of-them-to-finish-the-work-alone?show=3383#a3383Thu, 26 Oct 2017 14:16:27 +0000Answered: How long will it take Pedro can paint the same fence if he had to work alone?
https://ask.pinoybix.org/87/how-long-will-take-pedro-can-paint-the-same-fence-had-work-alone?show=3382#a3382
it will take 10 hours to finish the jobMathhttps://ask.pinoybix.org/87/how-long-will-take-pedro-can-paint-the-same-fence-had-work-alone?show=3382#a3382Thu, 26 Oct 2017 14:15:18 +0000Answered: If both pipes are opened, how long will it take to fill the empty tank?
https://ask.pinoybix.org/84/if-both-pipes-are-opened-how-long-will-take-fill-the-empty-tank?show=3381#a3381
1/2 - 1/4 = 1/x<br />
<br />
x = 4 hoursMathhttps://ask.pinoybix.org/84/if-both-pipes-are-opened-how-long-will-take-fill-the-empty-tank?show=3381#a3381Thu, 26 Oct 2017 14:14:28 +0000Answered: With all the three pipes open, how long will it take to fill the tank?
https://ask.pinoybix.org/83/with-all-the-three-pipes-open-how-long-will-take-fill-the-tank?show=3380#a3380
1/5 + 1/4 - 1/20 = 1/x<br />
<br />
x = 2.5 hoursMathhttps://ask.pinoybix.org/83/with-all-the-three-pipes-open-how-long-will-take-fill-the-tank?show=3380#a3380Thu, 26 Oct 2017 14:13:30 +0000Answered: How long will it take to fill an empty tank with all pipes in operation?
https://ask.pinoybix.org/85/how-long-will-it-take-fill-empty-tank-with-all-pipes-operation?show=3379#a3379
1/9 + 1/12 + - 1/15 = 1/x<br />
<br />
x = 7. 826 hrsMathhttps://ask.pinoybix.org/85/how-long-will-it-take-fill-empty-tank-with-all-pipes-operation?show=3379#a3379Thu, 26 Oct 2017 14:12:21 +0000Answered: John is 3 times as old as Mark. Three years ago, John was four times as old as Mark. The sum of their ages is?
https://ask.pinoybix.org/75/john-times-mark-three-years-john-four-times-mark-sum-their-ages?show=3378#a3378
3x - 3 = 4 (x-3)<br />
<br />
x = 9<br />
<br />
3 ( 9) = 27<br />
<br />
9 + 27 = 36Mathhttps://ask.pinoybix.org/75/john-times-mark-three-years-john-four-times-mark-sum-their-ages?show=3378#a3378Thu, 26 Oct 2017 14:09:56 +0000Answered: In five years, William will be three times as old as Jerome. What is the present age of Jerome?
https://ask.pinoybix.org/79/five-years-william-will-three-times-jerome-what-present-jerome?show=3377#a3377
3 (x+5) - 5 (x-6) = x+5 - (x-6)<br />
<br />
x = 17Mathhttps://ask.pinoybix.org/79/five-years-william-will-three-times-jerome-what-present-jerome?show=3377#a3377Thu, 26 Oct 2017 14:08:06 +0000Answered: In how many days can all of them do the work together?
https://ask.pinoybix.org/91/in-how-many-days-can-all-of-them-do-the-work-together?show=3376#a3376
it will take 19 days to finish the jobMathhttps://ask.pinoybix.org/91/in-how-many-days-can-all-of-them-do-the-work-together?show=3376#a3376Thu, 26 Oct 2017 14:04:38 +0000Answered: If A can do the work in “x” days and B in “y” days, how long will they finish the job working together?
https://ask.pinoybix.org/86/can-the-work-days-days-long-will-they-finish-working-together?show=3375#a3375
1/x + 1/y = 1/n<br />
<br />
n = x(y)/x+yMathhttps://ask.pinoybix.org/86/can-the-work-days-days-long-will-they-finish-working-together?show=3375#a3375Thu, 26 Oct 2017 13:57:42 +0000