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3 years ago

Field 0.45 kilo long and 0.4 kilo wide. What is the area in square meters

Mathematics

2 answers:

IgorLugansk [536]3 years ago

8 0

Answer:

180000

Step-by-step explanation:

xenn [34]3 years ago

4 0

Answer:

180.000 m^2.

Step-by-step explanation:

Area in square kilometers

= 0.45 * 0.4

= 0.18

There 1000* 1000 = 1,000,000 square meters in a square kilometer so

Area in sq meters = 0.18 * 1000000

= 180,000 m^2.

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X^2 - y^2 = 100

luda_lava [24]

Answer:

Step-by-step explanation:

Let's start by rewriting the second equation in terms of "x":

$x+y=5$

Subtract y from both sides:

$x=5-y$

Now, substitute "5-y" for "x" in the first equation:

$(5-y)^2-y^2=100$

Note that:

$(a-b)^2=a^2-2ab+b^2$

$25-10y+y^2-y^2=100$

Cancel out like terms:

$25-10y=100$

Subtract 25 from both sides:

$-10y=75$

Divide both sides by -10

$y=\frac{75}{-10}=\frac{15}{-2}=-\frac{15}{2}$

Now, substitute this value back into either of the equations to solve for x.

$x+y=5\\x-\frac{15}{2}=5\\$

Add 15/2 to both sides:

$x=5+\frac{15}{2}\\x=\frac{10}{2}+\frac{15}{2}\\x=\frac{25}{2}$

Now, find the difference:

$x-y=\frac{25}{2}-(-\frac{15}{2})=\frac{25}{2}+\frac{15}{2}=\frac{40}{2}=20$

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3 years ago

If you have $100 and then lose $25 what is the percent change

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$\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}$

The lost percentage is 25%

The percentage remaining is 75%

Thanks
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Step-by-step explanation:

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Step-by-step explanation:

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