₦airaland Forum

Fanccy: 2nioshine, thanks for starting off this equation. I have been trying it out but still hanging on the way. Am waiting for you to complete it.
doubledx and Ortarico. Am waiting for you guys to make a contribution.

oyestephen: Find a two-digit number such that 3 times the unit digit is 2 less than twice the tens digit and the number is 18 greater than the number obtained by reversing the digits
A) 42 b)24 c)47 d)72 e)74

labodinho: Solution to this triangle stuff...Height and base has ratio 1:3 so Height=1 and Base=3 since base and height are unknown for there specific value we replace as X,so that height=1*X=X and base=3*X=3X....Area of a triangle=1/2*base*height...solution...216cm sqaure=1/2*3X*X 216=1/2*3Xsqaure.......216=3X sqaure/2......216*2=3x sqaure....3xsqaure=432......xsqaure=432/3.......xsqaure=144......taking sqaure to the other side bcumz sqaure root.....x=sqaure root of 144.....X=12...subt. x for base and height .base=3x=3(12)=36......height=X and x=12 i.e height=12...Q.E.D

Richiez: @ortarico, u'r doing a very nice job. estilo must be a very lucky gurl

doubleDx: Solution

Since equation (1) and (2) are related by "t", elimating "t" by sustitution gives us (y) in terms of (x), making it easier to compute for the second derivative ( d^2y/dx^2) of the equation with respect to x.

y = cos^2t ......(1)
x = sin^2t ......(2)

We know that sin^2t + cos^2t = 1
:. cos^2t = 1 - sin^2t , subtituting this in equation (1) yields=>
y = 1 - sin^2t.....(3)
From equation (2), sin^2t = x
Substituting the above in (3) yields=>
y = 1 - x
Differentiating yields=>
dy/dx = -1
Differentiating again yields =>
d^2y/dx^2 = 0


@Ortarico, nice work!

mathefaro: Well done

estilo: Good mowin house,

Pls help me to solve dis questions.



@ ortarico, tenks for yesterday.

estilo: May God continue to strengthen you even in wisdom and understanding.

Tenks sir.

estilo: Q3)A a student scores the following marks in his first year: maths- 62%,Physics-49%.Engineering-72%,English Lang-35%,social studies-21%. If the credit loaded attached to each of the courses are 4,5,4,3 and 1 respectively. Determine the student's average grade.

(B) three men shot at a target. The probabilities that the three men can hit the target are respectively 1/5,2/3,and 1/2. Find the probability that: (1)exactly one of them hit the target (11) if only one hits the target,then it was the first.

(C) A,B,C are three mutually exclusive events,one of which is bound to occur. The probability that either B or C occurs is 2/3 and the probability that either A or C occur is 3/5. Find the probability of C occuring.

Thanks

yemmytcm: Aurorae,you too be fyn gal o....well,you dnt need to whine me,halleluyah that nepa has released ya. How's prep na ?....make e no be lyk say i be woman wrapper. Everyone...how is jacking ? Its gonna be well.juz chill

Dose #4 : which country is hosting the 2014 world cup ? USA/Argentina/brazil/germany.

Dose #5 :convert -320degree to radian measure. Give answer using 3.14 for pi.

A. 32pi B. 2.57 C. -5.58 D.1.31

labodinho: Bro,i don shine ham ooooo...sry bout dah,u've gat d PQ's pack too?

labodinho: Anyone...*1 Find the positive solution of the equation Log(x+1) + Log (x+4)= 1 A.6 B.0 C.2 D.1 *2 If alpha and beta are roots of the equation 2x rays to power(RTP) 2 + 3x - 9=0, find 1/alpha + 1/beta A.-1/3 B.2/3 C.3 D.1/3

mathefaro: My brother, he that thinks he's the best and an oga will fall indefinitely

labodinho: Bro,i knw datz d right solution buh wat wil u do y in exam hall wif dis kinda qustn,wat wil u choose? Everyone know that (n-2)=180 which is sum of interior angles.

labodinho: ...Datz d wrkin no doubt buh d options dosen't carry d answer.Mayb frm dem.

oyestephen: Formular; (n-2)180=total interior angles.....n=2k+1....(2k+1-2)180=140(2k+1)
(2k-1)180=140(2k+1)
360k-180=280k+140(collecting like terms)
360k-280k=180
+140
80k=320(divide both sides by 80)
K=4...n=2k+1...n=2(4)+1...n=8+1...n=9 sides
PROOF: 9-2*180=7*180=1260..140*9=1260

yemmytcm: antartica is the coldest continent...youre right,lima is da capital of peru

mathefaro: lolz, not yet an oga....

mathefaro: let d cost of one article be = y
c.p of 20 articles = 20y
s.p = 20y + (16% of 20y)
s.p = 23.2y
c.p for 10 articles = 10y
s.p = 10y - (4% of 10)
s.p = 9.6y
total s.p = 9.6y + 23.2y
total s.p = 32.8y
total c.p=20y + 10y = 30y
total gain = 32.8 y - 30y
total gain = 2.8y
% gain =(2.8y x 100)/30y
%gain = 9.33%
This is the solution to the number two.
Sorry, I didn't see your message earlier, I only saw the one quoted under my reply.

hakym_biyi@yaho:
Infact, it needs to be checked very well, because all the students who are representing their schools for quize and other related competition and are coming out in flying colours are regarded as part of this menace we called failure. i can remember when i wrote thesame jamb in 1996 where the only result i got was the word "DELETE" directly from jamb office@ ikoyi.Now tell me if this ppl are really serious about our educational carrier.

Harjibode: tot mercenary is been use in the millitary.

chukxie: There are 48 sounds on any standard IPA chart, my friend. I'm not going to argue with you if you don't believe me. You can either ask your teacher or just google it.

Klinee: maybe your sister didnt follow the steps-by type the her exact exam number.jamb is most reliable body that conduct exam here in nigeria.scraping of jamb will bring all sort of malpractice in our educational system.there is nothing like bribing,expo,machinary,impersonating and copying from another in jamb exam.if u do any of this autumatically u will fail,becos the system by which the exam was set will not favour u.

mathefaro: Wrong, check ur substitution, u made a slight error. d ans is 105

doubleDx: ^

@Onioshine, solved it correctly! It's just that the answer is 129 and NOT 122==>>

The common ratio of the GP, r = 3 since the GP is positive

Since 2d = -3r, Then the corresponding common difference of the AP, d = -9/2.

Sum of their 5th terms is =>
GP 5th term=> ar^4
AP 5th term=> a + 4d

Sum of 5th terms of both series = ar^4 + a + 4d.
Substituting r, d and a for =>>
r = 3, d = -9/2 and a = 3/2,
The sum of their 5th terms yields =>

= ar^4 + a + 4d
= (3/2)(3)^4 + 3/2 + 4(3/2)
= 243/2 + 3/2 + 6
= 258/2
= 129

Hence the sum of the series 5th terms is 129.

mathefaro: Good work. Welldone, but you made a slight mistake in your final answer. please check and make necessary corrections