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3 years ago

6

On a certain day the exchange rate was 60 u.s dollars 50 euro. How many US dollars were 70 euro worth that day? Show that your a

wnser is reasonable

1 answer:

gayaneshka [121]3 years ago

8 0

This is what I got:

60/50 = X/70
70x60/59 = X
X = 84

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In the rhombus m<1 = 160°. what are m<2 and m<3?

ehidna [41]

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M,3 is 80

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Answer:

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A circle has the equation 2x²+12x+2y²−16y−150=0.

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Answer: B. The coordinates of the center are (-3,4), and the length of the radius is 10 units.

Step-by-step explanation:

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Where $(h,k)$ are the coordinates of the center and $r$ is the radius.

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Rearranging the equation:

$x^{2}+6x+y^{2}-8y=75$ (4)

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Now we have to complete the square in both parenthesis, in order to have a perfect square trinomial in the form of $(a\pm b)^{2}=a^{2}\pm+2ab+b^{2}$ :

<u>For the first parenthesis:</u>

$x^{2}+6x+b^{2}$

We can rewrite this as:

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Hence in this case $b=3$ and $b^{2}=9$ :

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$y^{2}-8y+b^{2}$

We can rewrite this as:

$y^{2}-2(4)y+b^{2}$

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$(x^{2}+6x+9)+(y^{2}-8y+16)=75+9+16$ (6)

<u>Note we are adding 9 and 16 in both sides of the equation in order to keep the equality.</u>

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