Maths, Addmaths and Statistics: Post your doubts here!

[awaisbuttrocksCIE]

how to calculate the area of a pentagon??

 

[scouserlfc]

I hope its a regualr one then u do this divide the pentagon into triangles and then by finding area of one triangle and then multiplying by the no. of triangles u get ur area still finding what i wrote go above ur head then ive got another solution click below and see ur self !

http://www.math-prof.com/Geom/Geom_Ch_26.asp

 

[awaisbuttrocksCIE]

Three unbiased dice are thrown. Find the probability that
(i) they all show different numbers,
(ii) at least two show the same number.

 

[nightmaressana]

hey, can anyone please tell me how to find the maximum value of x and the minimum value of y of chapter sets? Please?

 

[scouserlfc]

hey, can anyone please tell me how to find the maximum value of x and the minimum value of y of chapter sets? Please?

For that u have to first tell me how x and y are arranged in the set that is what is x and y in the set !

 

[nightmaressana]

For that u have to first tell me how x and y are arranged in the set that is what is x and y in the set !

ok... ill tell you the question.

 

[awaisbuttrocksCIE]

hey, can anyone please tell me how to find the maximum value of x and the minimum value of y of chapter sets? Please?

I also wanted to know the same thing

 

[SalmanPakRocks]

Hi, I m doing a very silly mistake here
I m getting the answer as
2x + 5x^2/2 + 1/x +4 + c

while the answer in MS is
2x+5x^2/2 +1/2-x + c
Can anyone correct me ?

 

[Nibz]

• 2x + 5x^2/2 - (x-2)^(-2+1) + c
• 2x + 5x^2/2 (-(x-2)^-1 /-1 + c
• 2x + 5x^2 /2 + 1/ x-2 + c

 

[HarisLatif]

Please solve this question.
Q- The sum of the perimeter of two squares is 52cm and the sum of their areas is 89 cm square. find the length of the sides of the squares..
help please.

 

[Nibz]

Let the length of one square be x and the other square be y.
Sum of perimeters = 4x + 4y
1. 4x + 4y = 52

Sum of areas = x^2 + y^2
2. x^2 + y^2 = 89

• From 1. x = (52 - 4y)/4 => x = 13 - y
• Put this in 2.

• (13 - y)^2 + y^2 = 89
• 169 - 26y + y^2 + y^2 = 89
• 2y^2 - 26y + 80 = 0
• y = 8 ; y = 5
• Put these values in x = 13 - y
• 13 - 8 = 5 or 13 - 5 = 8
• So length of one square = 8 cm;
• length of the other square = 5 cm

 

[HarisLatif]

thankyou so much..

 

[SalmanPakRocks]

thankyou so much..

you can always press the like button if someone help's u =)

 

[multixamza01]

How do i calculate upper and lower bounds? Can someone help? If we have a number , say 27. What's the upper and lower bound and how do i derive them?

 

[SalmanPakRocks]

How do i calculate upper and lower bounds? Can someone help? If we have a number , say 27. What's the upper and lower bound and how do i derive them?

it is given in the question. Like they must have told u nearest to cm or something like that. let's make it nearest to cm in ur case.
1 cm /2 = 0.5cm
U.B = 27 + 0.5 = 27.5
L.B = 27 - 0.5 = 26.5

 

[scouserlfc]

Exactly u can also express this in inequality form !

 

[nightmaressana]

Hey..... can someone tell me, the tips and tricks of doing the number pattern question?
And i am extremely sorry for not posting the question, the truth is, ive been really busy with test again!

 

[fatikhalid]

i hav several questions
(i) wat iz da diff bw subset nd proper subset?
(ii) how do v calculate order of rotational symmetry nd wat exactly iz ds?
(iii) how do v calculate gradient of a curve?

 

[paradoX error]

very difficlt Q(s) ha aha aha

 

[paradoX error]

i think this will help abt the rotational symmetry
http://www.mathsisfun.com/geometry/symmetry-rotational.html