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3 years ago

40 out of 50 as a percentage

Mathematics

2 answers:

inn [45]3 years ago

5 0

40/50 x 2 = 80/100

Answer: 80%

matrenka [14]3 years ago

4 0

"Out of" represents, mathematically, the fraction line. So 40 out of 50 can be represented by 40/50. The percentage can be represented by a fraction over 100. So to transform 40/50 to a fraction /100, we multiply 50 by 2, and of course we should multiply 40 by 2 too.
So 40/50 = 40 * 2/50 * 2 = 80/100 = 80%

So, 40 out of 50 is 80% as a percentage.

Hope this Helps! :)

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This figure is made up of a quadrilateral and a semicircle.

Arturiano [62]

Answer:

The correct option is B. The area of the figure is 40.4 units².

Step-by-step explanation:

The line AB divides the figure in two parts one is a rectangle and another is semicircle.

The distance formula is

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

The length of AB is

$AB=\sqrt{(2+3)^2+(4-2)^2}=\sqrt{25+4}=\sqrt{29}$

The length of AD is

$AD=\sqrt{(-1+3)^2+(-3-2)^2}=\sqrt{4+25}=\sqrt{29}$

Since AB=AD, therefore ABCD is a square. The area of the of square is

$A_1=a\times a=\sqrt{29}\times \sqrt{29} =29$

The area of square is 29 units².

The area of a semicircle is

$A_2=\frac{\pi}{2}r^2$

Since AB is the diameter of the semicircle, therefore the radius of the semicircle is

$r=\frac{d}{2}=\frac{\sqrt{29}}{2}$

The area of the semicircle is

$A_2=\frac{3.14}{2}(\frac{\sqrt{29}}{2})^2=40.3825$

The area of the figure is

$A=A_1+A_2=29+11.2825=40.3825\approx 40.4$

Therefore the area of the figure is 40.4 units². Option B is correct.

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3 years ago

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Answer:

Step-by-step explanation:

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Akimi4 [234]

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Step-by-step explanation:

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DaniilM [7]

Let
x = the number of shorts bought
y = the number of t-shirts bought

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y ≤ - 1.6x + 10 (1)

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x ≥ 2 (2)

Graph the equations y = -1.6x + 10 and x = 2.
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