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galina1969 [7]
3 years ago
9

A town is debating to put curbs along streets. The ratio of town residents who support the act to those who appose is 2 to 5. If

210 people were surveyed, how many people are expected to support the act based on the ratio?

Mathematics
2 answers:
Tju [1.3M]3 years ago
7 0
In the ratio, 5 is the max. In the survey, 210 is the max. Now, what times 5 = 210?
You can find that any way you like, though I prefer division.
210÷5 = 42
Therefore, 42 is the number you will multiply by 2 to find you answer.
42×2=84
Gennadij [26K]3 years ago
3 0
Based on the ratio 84 people support the act because 210 divided by 5 times 2 is 84
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Answer:

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\implies f(x)=ax^3+bx^2+cx+2ax^2+2bx+2c

\implies f(x)=ax^3+2ax^2+bx^2+2bx+cx+2c

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To find <em>a</em>, compare the coefficients of x³:

\implies a=3

To find <em>b</em>, substitute the found value of <em>a</em> into the coefficient for x² and compare:

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\boxed{\text{If \; $a \cdot b = 0$ \; then either \; $a = 0$ \;or \;$b = 0$ (or both)}.}

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\implies x-1=0 \implies x=1

Therefore, the zeros of the function are:

x=-2, \quad x=\dfrac{5}{3},\quad x=1

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Answer:

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