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vlada-n [284]
3 years ago
6

A kitchen floor is in the shape of a square.

Mathematics
1 answer:
ZanzabumX [31]3 years ago
3 0

Answer:

132.25

Step-by-step explanation:

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Ten is 5% of what number?
Karo-lina-s [1.5K]

Answer:

200

Step-by-step explanation:

4 0
3 years ago
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HELP ME PLEASEEEEEEEEEEEEEEEEEEEEEEEEEE WILL GIVE BRAINLIST
Nadya [2.5K]

Answer:

width = 18 cm

27/3.6=7.5

2.4x7.5=18

4 0
3 years ago
Can you think of any 2x2 matrices d for which cd = dc for all 2x2 matrices c? give 2 different examples of such matricesd.
Ksju [112]
For any arbitrary 2x2 matrices \mathbf C and \mathbf D, only one choice of \mathbf D exists to satisfy \mathbf{CD}=\mathbf{DC}, which is the identity matrix.

There is no other matrix that would work unless we place some more restrictions on \mathbf C. One such restriction would be to ensure that \mathbf C is not singular, or its determinant is non-zero. Then this matrix has an inverse, and taking \mathbf D=\mathbf C^{-1} we'd get equality.
6 0
3 years ago
Help? im confused plss!<br> Find the area of the regular polygon with the given radius or apothem
Snezhnost [94]

Answer:

  50 cm²

Step-by-step explanation:

Given that the regular polygon is a square, there are multiple ways you can jump directly to the answer. Perhaps the simplest is to use the formula for the area of a rhombus:

  A = 1/2(d1)(d2)

where d1 and d2 are the lengths of the diagonals. Here, we see that half the diagonal is 5 cm, so the area is ...

  A = (1/2)(10 cm)(10 cm) = 50 cm² . . . . area of the polygon

__

<em>Alternate solution</em>

If you want to use the radius and the number of sides in a formula, you can consider the area of each triangle formed by radii and a side. That triangle has area ...

  A = 1/2r²sin(α)

where r is the radius and α is the central angle. For an n-sided polygon, the area is the sum of n of these triangles, and the central angle is 360°/n. Then the polygon area is ...

  A = n/2·r²·sin(360°/n)

For n = 4 and r = 5 cm, the area is ...

  A = (4/2)(5 cm)²(sin(360°/4)) = 2(5 cm)²(1) = 50 cm² . . . . area of square

_____

<em>Additional comment</em>

The formula is somewhat different if you start with the length of the apothem. One way to find the area is using the above formula and the relation between the radius and apothem:

  r = a·sec(180°/n)

Another formula uses the apothem directly:

  A = n·a²·tan(180°/n)

8 0
2 years ago
For the function f(x) = x + 7, what is the ordered pair for the point on the graph when x = 2b. A. ( 2b, 2b+7). B. ( 2b, x + 7).
Fynjy0 [20]
f(2b)=2b+7\\\\&#10;(2b,2b+7)
6 0
3 years ago
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