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What is the sign of
3xy when
x > 0 and
y < 0 ?
Choose 1 answer:
(A) Positive
(B) Negative
(c) Zero

What is the sign of $3 x y$ when $x>0$ and $y<0$ ? $\newline$ Choose $1$ answer: $\newline$ (A) Positive $\newline$ (B) Negative $\newline$ (c) Zero

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Inverses of sin, cos, and tan: degrees

Full solution

Q. What is the sign of

3 x y

when

x>0

and

y<0

?

\newline

Choose

1

answer:

\newline

(A) Positive

\newline

(B) Negative

\newline

(c) Zero

If $x$ is positive: If $x$ is greater than $0$ , then $x$ is positive.
If $y$ is negative: If $y < 0$ , then $y$ is negative.
Multiplication rule: Multiplying a positive number by a negative number results in a negative number.
Conclusion: Therefore, $3xy$ is negative because $3$ is positive, $x$ is positive, and $y$ is negative.

More problems from Inverses of sin, cos, and tan: degrees

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\newline

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g(x)=2^{x}

\newline

Can we use the mean value theorem to say the equation

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\newline

1

\newline

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\newline

(B) No, since the average rate of change of

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\newline

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