3 years ago

Does the equation y = 4.2x represent a proportional relation ship

Mathematics

1 answer:

12345 [234]3 years ago

3 0

Yes because there are no constants after

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3 years ago

Find the error & find the correct answer 2In(x)=In(3x)-[In(9)-2In(3)] In(x^2)=In(3x)-[In(9)-In(9)] In(x^2)=In(3x)-0 In(x^2)=

Art [367]

Answer:

Error: $lnx^2=ln 3x$ not $ln\frac{3x}{0}$

Solution:x=0 and 3

Step-by-step explanation:

We have to find the error and correct answer

Given: $2ln x=ln(3x)-[ln9-2ln(3)]$

$lnx^2=ln(3x)-[ln9-ln3^2]$

Using the formula

$alog b=logb^a$

$lnx^2=ln(3x)-[ln9-ln9]$

$lnx^2=ln(3x)-0$

$lnx^2=ln(3x)$

$x^2=3x$

$x^2-3x=0$

$x(x-3)=0$

Therefore, x=0 and x=3

But last step in the given solution

$lnx^2=ln\frac{3x}{0}=\infty$

It is wrong this property is used when

$log m-log n$ then

$log\frac{m}{n}$

Hence, the student wrote $lnx^2=ln\frac{3x}{0}$ instead of $lnx^2=ln3x$ and solution is given by

x=0 and x=3

4 0

3 years ago

Does someone mind helping me with this problem? Thank you!

Damm [24]

Using the Pythagorean theorem:

c = sqrt(8^2 + 7^2)

c = sqrt(64 + 49)

c = sqrt(113)

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2 years ago

Read 2 more answers

Without calculating would 0.4+(2+0.6)be less than, greater than,or equal to 3? Explain

masya89 [10]

The answer would be “Greater than.”

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4 years ago

3x-6y=15<br> -3x-9y=-30<br><br> Please help!! Its due in 30 minutes!!

olchik [2.2K]

Step-by-step explanation:

Refer to the attachment.

I hope it helps:)

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3 years ago