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Hi and thanks
18x^2 24xy + 8y^2
=2(9x^2-12xy+4y^2)
=2{(3x)^2-2(3x)(2y)+(2y)^2}
=2(3x-2y)^2
but the answer given is 2(3x + 2y)^2
A. Factorise completely:
(a) 18x^2 24xy + 8y^2
the answer i get is 2(3x+y)^2
but the answer given is 2(3x + 2y)^2
B.Factorise the following:
(a) (x 4)(x + 1) + 4a ax
the answer i get is (x-4)(x+1-a)
but the answer given is (x-4)(x-1-a)
its not my homework.its my younger brothers homework that i have to help him in doing but i m not good in such questions
Queation 6
Area of 2 rectangles=L*W+L*W=6*7+6*7=84
Area of sqare=9*9=81
Total Area=165
Now is it right ?
u used this formula 2(L*W+L*H+W*H) to get the answer ?
how and what u get for 3 and 6 ?
I know its wrong but i want the correct answer.
All my volume answers are correct but area answers are not.So i want the correct answers for area of Question 2,3 and 6
Whats the Surface Area of Question number 2,3 and 6 ?
Formula used to get surface area for the above mentioned answers is 2(L*W+L*H+W*H)
Any 1 reply
Here are the answers.
1)Volume=1344,Area=864
2)volume of square=864
Volume of rectangle=108
Total Volume=972
Area of square=720
Area of rectangle=180
total surface area=900
3)Volume of triangle=336
Area of triangle488
4)volume=288
Area=368
5)??
6)Total Volume=2520
Total surface area=1684
Volume and surface area of right prism (Answer Check)
@ bobbym
i have resized the image to less than 100 KB but still its not loading.Now what should be done.
Please tell me what to do onle we select open slot to 1 and then brose the image.Then what to do ?
Thanks for all the help.One thing i want to understant is that why for perimeter 2 perimeters are added instead of subtracting like the same as finding the area of the shaded region
but how can i do that ? Can u give me ur email id so i can mail the image to u
its a jpg image with the size 800 KB almost
When I Select From Open Slot To 1 Then I Select The Image From My Computer And After That The Name Appears After The Open Slot Option But Nothing Happens After That.
Area and Perimeter of Shaded region (ANSWERS CONFIRMATION)
In attachment there are 8 question and i want to confirm my answers
Q1)Area(Shaded)=41
Perimeter(Shaded)=25
Q2)Area(shaded)=114
Perimeter(shaded)=6.44
Q3)Area(shaded)=490
Perimeter(shaded)=75
Q4)Area(shaded)=88.9
Perimeter(shaded)=
Q5)Area(shaded)=55
Perimeter(shaded)=14
Q6)Area(shaded)=123
Perimeter(shaded)=21
Q7)Area(shaded)=14
Perimeter(shaded)=15.5
Q8)Area(shaded)=
Perimeter(shaded)=37.5
STILL UNABLE TO UPLOAD THE IMAGE.ITS ALMOST 800KB IN SIZE AND JPG IN FORMAT.pLZ HELP ME IN THIS REGARD
1)Particular species of bird weighs about 28 grams when born.If the weight increases by 10% a day,How much will it weigh on the third day of its life ?
How can this question be solved ?
Is there any formula to help solve such percentage questions ?
2)35% of the plants in the part are broad leafed plants and the rest are gasses.What percentage of the plants are grasses ?
Is there any trick in this question ?
The answer should be 65% ?
Also i want to know how to upload an image ?As i tried and selected a jpeg file but there was no option to attach it or no upload button avaiable
How to construct a kite PQRS where PQ=QR=3.6 cm ,PS=6.9cm and PQR=124 degree
Find the diagonals PR and QS
my question don't state that a perpendicular bisector be made.my question states like this DRAW A LINE AB 10 CM AND BISECT IT.
So what should be done in this case ?
I want to know that if the question states that make a line of length 10 cm and make a bisector.
So does that mean a perpendicular bisector or its something else ?
I need a simple way to solve this question.
It takes 3 men to gig 2 identical trenches in 5 hours .If all the men work at the same rate ,how long will it take 5 men to dig 7 of these trenches ?
i have solved it this way through the help of an example in the book.
Solution
First we keep the number of trenches constant
No of men No of trenches No of Hours
3 2 5
1 2 5*3
5 2 (5*3)/5=3
Next we keep the number of men constant
No of men No of trenches No of Hours
5 2 3
5 1 3/2=1.5
5 7 1.5*7=10.5
Therefore 5 men will take 10.5 hours to dig 7 identical trenches.
I want a simpler solution to this.
how can i find the answers in km when nothing is given relating what is equal to km ?
A rectangle drawn to a scale of 1 cm : 200m.Given that AB=6cm(height) and BC=4cm (width), find the actual
a)Actual length and breadth of the rectangle in km
b)area of rectangle in km square