Math Problem! - Education

Math Problem! - Education - Nairaland

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Math Problem! by Nobody: 9:31pm On Jul 19, 2022

Can Someone help solve this?

Re: Math Problem! by Nobody: 9:23am On Jul 20, 2022*

Drslime:
Can Someone help solve this?

Let the original length be L and the original width be W
L * W=8000
(L-10)*(W+10)= 8100
LW+10L-10W-100= 8100
Remember LW=8000
10L-10W= 8100+100-8000
10L-10W=200
L-W=20
L=20+W
Put L=20+W into equation one
(20+W)W= 8000
W^2+ 20W-8000=0
Using any method to solve the above quadratic equation
W= -100 or 80
Since width cannot be negative, then W= 80m
L= 20+80= 100m
The original length is 100m while the original width is 80m

2. Sum of interior angle in a pentagon = 540°
The interior angles from the figure are 90°, 90°, 20°, 110
The last one is 230°
230° + angle R = 360°
Angle R= 130°

Re: Math Problem! by Abdullah36(m): 10:47am On Jul 20, 2022

The second one is 130°

Re: Math Problem! by Aminu212: 10:52am On Jul 20, 2022

Answer to the second question is 130.
If you draw a straight line through R.

Re: Math Problem! by Nobody: 3:43pm On Jul 21, 2022

matex97:
Let the original length be L and the original width be W
L * W=8000
(L-10)*(W+10)= 8100
LW+10L-10W-100= 8100
Remember LW=8000
10L-10W= 8100+100-8000
10L-10W=200
L-W=20
L=20+W
Put L=20+W into equation one
(20+W)W= 8000
W^2+ 20W-8000=0
Using any method to solve the above quadratic equation
W= -100 or 80
Since width cannot be negative, then W= 80m
L= 20+80= 100m
The original length is 100m while the original width is 80m

2. Sum of interior angle in a pentagon = 540°
The interior angles from the figure are 90°, 90°, 20°, 110
The last one is 230°
230° + angle R = 360°
Angle R= 130°

Thank you very much sir! I understand now.

Re: Math Problem! by Nobody: 3:44pm On Jul 21, 2022

Abdullah36:
The second one is 130°

Thank you very much sir!

Re: Math Problem! by Nobody: 5:24pm On Jul 21, 2022

Drslime:
Thank you very much sir! I understand now.

You are welcome sir

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