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3 years ago

Find all real values of x for which f(x) = 0. f(x) = 30 - 5x

Mathematics

1 answer:

Roman55 [17]3 years ago

4 0

Answer:

$f(x) = 30 - 5x \\ f(x) = 0 \\ 30 - 5x = 0 \\ 30 = 5x \\ 5x = 30 \\ x = \frac{30}{5} \\ \purple{\boxed{ \red{x = 6}}}$

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Aloiza [94]

32
Because
1 times 1=1 ,1plus1=2
2 times 2=4,4plus4=8
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4 years ago

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zmey [24]

Answer:

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Step-by-step explanation:

-Let x be the distance between John and clock tower.

-Let y be the vertical distance from the eyes of the two men standing to the top of the clock tower.

#Taking the right triangle ACD:

$\Tan \ theta=\frac{Perpendicular \ Height}{Base}\\\\Tan \ 60\textdegree=\frac{y+1.5}{x}\\\\y=x \ Tan \ 60\textdegree -1.5$

#Taking the right triangle ABD:

$\Tan \ theta=\frac{Perpendicular \ Height}{Base}\\\\Tan \ 40\textdegree=\frac{y+1.5}{x+20}\\\\y=(x+20)\ Tan \ 40\textdegree -1.5$

#We equate the two yo solve for x and y;

$(x+20)\ Tan \ 40\textdegree -1.5=x\ Tan \ 60\textdegree -1.5\\\\(x+20)\ Tan \ 40\textdegree=x\ Tan \ 60\textdegree\\\\0.8391x+16.7820=1.7321x\\\\x=18.7939$

Hence, John's distance from the tower's base is 18.7939 m

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USPshnik [31]

Answer:

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2 years ago