3 years ago

Which ordered pair describes the location of the point shown on the

Mathematics

1 answer:

Sergeu [11.5K]3 years ago

7 0

Answer:

i need to see the plane please

Step-by-step explanation:

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Tina is saving to buy a notebook computer. She has two options. The first option is to put $200 away initially and save $10 ever

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200 + 10m = 100 + 30m
200 - 100 = 30m - 10m
100 = 20m
100/20 = m
5 = m....she will have saved the same amount at 5 months <==

200 + 10(5) = 200 + 50 = 250
100 + 30(5) = 100 + 150 = 250
she would have saved $ 250 <===

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3 years ago

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You need to divide the numerator by the denominator to get a decimal, so 1 divided by 3. You get 0.33 repeating, so it would be 0 dollars and 33 cents.

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A guy wire to a tower makes a 72 degrees angle with level ground. At a point 30 ft farther from the tower than the wire but on t

Andreyy89

So.. checking the picture below

we can say y = y, or just do a substitution and end up with

$\bf tan(72^o)=tan(30^o)(30+x)\implies 3.08x=\cfrac{30}{\sqrt{3}}+\cfrac{1}{\sqrt{3}}x
\\\\\\
3.08x-\cfrac{1}{\sqrt{3}}x=\cfrac{30}{\sqrt{3}}\implies 2.5x\approx 17.32\implies x\approx \cfrac{17.32}{2.5}$

once you know, how long is "x", then you can simply use the cosine of 72° to get "r"

thus $\bf cos(\theta)=\cfrac{adjacent}{hypotenuse}\qquad cos(72^o)=\cfrac{x}{r}\implies r=\cfrac{x}{cos(72^o)}$