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Vedmedyk [2.9K]

3 years ago

6

A math problem asks when two brothers will have saved the same amount of money. When Marta writes and solves the equation, her f

inal step is 3 = 7.
Assuming Marta has done everything correctly, how should she interpret this solution?

1 answer:

Bezzdna [24]3 years ago

3 0

That it wiil not equal out to be the same unless one of them start with money

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elena-14-01-66 [18.8K]

Hello,

$m\ \widehat{ABC}=x\\m\ \widehat{BAC}=2*x\\\\So:\\ x+2x=90^o\\x=30^o\\$

$cos(30^o)=\dfrac{\sqrt{3} }{2} \\$

In the triangle ABC,

$cos(30^o)=\frac{BC}{BA} \\\\BA=\dfrac{cos(30^o)}{BC} \\\\BA=\frac{\dfrac{\sqrt{3} }{2} }{24} =16*\sqrt{3} \\\\$

$sin(30^o)=\dfrac{1 }{2} =\dfrac{AC}{AB} \\\\AC=\dfrac{1}{2} *16\sqrt{3} =8\sqrt{3}$

In the triangle ACB,

$cos(30^o)=\dfrac{AC}{AL} \\\\AL=\dfrac{8\sqrt{3} *2}{\sqrt{3} } =16\\$

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2 years ago

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Irina18 [472]

Answer:

f(6) = 1

Step-by-step explanation:

Function:

f(x) = -2/3x + 5

f(6) = -2/3(6) + 5

f(6) = -4 + 5

f(6) = 1

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uysha [10]

It would have to be B

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Dahasolnce [82]

Answer:

B

$x \geqslant - 0.9$

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