What is the area rounded to the nearest square centimeter

Mathematics

2 answers:

77julia77 [94]3 years ago

6 0

138cm is my answer that I came up with

xz_007 [3.2K]3 years ago

3 0

This is a kite. We can split it into 2 equal triangles.

Length = 42.7 + 22.5 = 65.2cm
Height = 16.3 cm

Area of triangle = 1/2 x base x height

2 Area of triangles = 2( 1/2 x 65.2 x 16.3) = 1063 cm² (nearest cm)

Answer: 1063 cm² (Answer B)

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Please help for this question

kogti [31]

First you need to subtract the 29 and the 8 - equals 21
Then you subtract 7 and 4- equals 3
Lastly divide 21 and 3 and get the answer which is 7
Hope this helps.

8 0

3 years ago

Read 2 more answers

Which of the following letters on the number line could represent the √21 Image result for point on number

marissa [1.9K]

Answer:

4.58257

Step-by-step explanation:

That is the square root of 21, so if there's a point about there, then choose it.

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3 years ago

I need to make a matrix in reduced row echelon form

a_sh-v [17]

Let the three apartments be A, B & C

The rent of A is $x

The rent of B is $y

The rent of C is $z

So x + y + z = 1600 .......(1)

Now

Maintenance of A is 20% of x = 0.20x

Maintenance of B is 20% of y = 0.20y

Maintenance of C is 25% of z = 0.25z

0.20x + 0.20y + 0.25z = 345

Multiplying by 100 we get

20x + 20y + 25 z = 34500

Dividing by 5 we get

4x + 4y + 5z = 6900 .......(2)

Monthly fee of A is 10% of x = 0.10x

Monthly fee of B is 20% of y = 0.20 y

Monthly Fee of C is 10% of z = 0.10z

Now

0.10x + 0.20y + 0.10 z= 1820 - 1600

0.10x + 0.20y + 0.10z = 220

Multiplying by 100 we get

10x + 20y + 10z = 22000

Dividing by 10

x + 2y + z = 2200 ....(3)

Making a Matrix of equation (1), (2) & (3)

$\left[\begin{array}{ccc}1&1&1\\4&4&5\\1&2&1\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{c}1600\\6900\\2200\end{array}\right]$