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2 years ago

) The product of a number and 3 is 7.5. What is the number?

Mathematics

2 answers:

Elena L [17]2 years ago

6 0

Answer:

2.5

Step-by-step explanation:

X × 3=7.5

divide by 3

x=2.5

Zepler [3.9K]2 years ago

4 0

Answer: x * 3 = 7.5

X=2.5

Step-by-step explanation:

Divide by 3

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3 years ago

Solve: In 2x + In 2 = 0<br> DONE

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Answer:

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Step-by-step explanation:

We can use some logarithmic rules to solve this easily.

<em>Note: Ln means $Log_e$ </em>

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Now, lets start with the equation:

$ln(2x) + ln(2) = 0\\ln(2x) = -ln(2)$

Writing left side with logarithmic base e, we have:

$Log_{e}(2x) = -ln(2)$

We can now use the property shown below to make this into exponential form:

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So, we write:

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We recognize another property of exponentials:

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So, we write:

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Also, another property of natural logarithms is:

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Now, we simplify:

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