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3 years ago

F(x) = –22 – 9x + 20 Find f(9)

Mathematics

2 answers:

Nikolay [14]3 years ago

8 0

Answer: -83

Step-by-step explanation:

f(9)--22+20-9*(9)=-2-81=-83

sammy [17]3 years ago

7 0

You gotta replace the x for 9 so...
F(9)= -22 -9(9) + 20
F(9)= -22 -81 +20
F(9)= -22 - 61
F(9)= -83

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Amy raised £n for charity. Chris raised £18 more than Amy.

malfutka [58]

$Amy=n$
$Chris=n+18$

Mean:
$45= \frac{(n)+(n+18)}{2}$
So, $45=n+9$
Therefore, $n=36$

$Amy=n=36pounds$
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Hope I helped :)

(Sorry I was late for you other question)

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4 years ago

Can somebody do this without a calculator please?

zavuch27 [327]

$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$
multiply f to the entire equation
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add up right side

$1=\frac{fv}{uv} +\frac{fu}{uv}$
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$

multiply uv to both sides
$uv= fv+fu$
factor out f
$uv= f(v+u)$
divide (v+u) to both sides
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substitute in u=3.5cm and v=-4 cm

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3 years ago

What is the highest common factor of 60 and 75

Assoli18 [71]

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4 years ago

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n200080 [17]

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mezya [45]

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Step-by-step explanation:

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