Mr Duma

Mr Duma recently inherited a rectangular plot, part of the estate left by his late father. The plot with the following dimensions: Length=2x+1;Width=x-1.
Determine the formula, in terms of x, that best describes the area of the rectangular plot.

He has plans to do the following projects on the plot (rectangle has corner PQRS):
Project A: purchase fencing material to enclose three sides of the plot as follows: SP, PQ and QR.
Project B: build a fency wall on the front side, SR.
Project C: construct a paving for a third of the plot.
Find the formula that will be suitable for each of the following projects mentioned above. For each formula, give the reason for your choice.

Result

S = (Correct answer is: 2x^2-x-1) Wrong answer
A = (Correct answer is: 4x-1) Wrong answer
B = (Correct answer is: 2x+1) Wrong answer
C = (Correct answer is: (2x^2-x-1)/3) Wrong answer

Step-by-step explanation:

L=2x+1 W=x1  S=L W S=(2x+1) (x1) S=2x2+x2x1 S=2x2x1
A=SP+PQ+QR=W+L+W A=2W+L A=2 (x1)+2x+1 A=2x2+2x+1 A=4x1
B=SR=L B=2x+1
C=31 S  C=(2x2x1)/3



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Showing 7 comments:
Math student
I want the full method

5 months ago  23 Likes
Mavies
Please help me with this

5 months ago  4 Likes
Math student
Can I have the reasons for the formulae

5 months ago  24 Likes
Math Student
I need reasons

Math student
Please help with the reasons for the formulae

5 months ago  3 Likes
Thabley
Can I please get reasons

Math student
I need method used in C





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