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slavikrds [6]
3 years ago
11

A regular decagon has a radius of 8 cm.

Mathematics
2 answers:
svp [43]3 years ago
8 0

Answer: 188 cm² I think that's it

Step-by-step explanation:

nadezda [96]3 years ago
6 0

Answer:

188cm^2

Step-by-step explanation:

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A college parking lot is 140 ft long and 90 ft wide. The college wants to increase the area of the lot by 29% by adding strips o
Novay_Z [31]
The initial dimenssions of the park lot are:

length: 140 ft
width: 90 ft

initial area: 140 * 90 = 12,600 ft^2

Area increased 29% = 12,600 * 1.29 = 16,254 ft^2

width of the strips: x

New length: 140 + x

New width: 90 + x

New area: (140+x)(90+x) = 16,254

Solution of the equation:

12600 + 230x + x^2 = 16254

=> x^2 + 230x - 3654 = 0

Use the quadratic formula.

x = {-230 +/- √[ 230^2 - 4*1*(-3654) ]} / 2 =

x = 14.92

The other solution is negative so it is discarded.

Answer: 15 ft


 
5 0
3 years ago
Select the correct answer.
erica [24]

Answer:

D 9m 4m because 9 divided by 2 is 3 and 4 divided by 2 is 2 and that's us you answer.

4 0
3 years ago
Which ordered pair is a solution of the equation below? y=-7+2x?
Maru [420]
The answer to this question is:
  x  y  
(1,-5)   so the equation would be   -5=-7+2(1)   
                                                      -5=-7+2       -7+2=-5
                                                       -5=-5
hope this helps;)
8 0
3 years ago
A $120.00 pair of shoes at your nearby department store is marked up 4% and then is offered at 45% off. If sales tax is 13%, wha
S_A_V [24]

Answer:

$26

Step-by-step explanation:

0.8(X - 3) = 18.4

X - 3 = 23

X = 26

7 0
3 years ago
The answer is 355 houses, but can someone tell me how please?
Ymorist [56]
So you do 20%*426 to get 85.2 then you would subtract 85.2 from 426 because they sold 20% more than last year.  On top of that the answer isn't 355 it is 340.8.
5 0
3 years ago
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