3 years ago

Solve the following: 9log2x=15

Mathematics

1 answer:

lara31 [8.8K]3 years ago

6 0

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Which expression is modeled by this set of arrows on the number line? A number line going from negative 8 to positive 8. An open

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A -6 divided by (-3)

Step-by-step explanation:

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Tom and Becky can paint Jim's fence together in 12 hours. If all people paint at the same rate, how many hours would it take to

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Answer: 8 hours

Step-by-step explanation:

Let x be the time taken by each person to paint the fence.

Given: Tom and Becky can paint Jim's fence together in 12 hours.

Since all people paint at the same rate, then we have the following equation ;-

$\dfrac{1}{x}+\dfrac{1}{x}=\dfrac{1}{12}\\\\\Rightarrow\ \dfrac{2}{x}=\dfrac{1}{12}\\\\\Rightarrow\ x=24$

Thus, the time taken by each person to paint the fence alone = 24 hours

Now, the time taken by all three paint together:-

$\dfrac{1}{t}=\dfrac{1}{24}+\dfrac{1}{24}+\dfrac{1}{24}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{3}{24}\\\\\Rightarrow\ t=\dfrac{24}{3}=8\text{ hours}$

Hence, it would take 8 hours if all three paint together.

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3 years ago

Write an equivalent equation that does not contain parentheses for 3(k-x) = -3x-9

amm1812

3(k-x)= -3x-9
3k - 3x = -3x - 9 ← equation without parentheses
3k - 3x + 3x = - 9
3k = -9
k = -9/3
k = -3 ← simplest form

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4 years ago

Perform the indicated operations. Write the answer in standard form, a+bi.<br> -5-7i / 13+4i

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URGENT!!!!!! A 5 inch × 7 inch photograph is placed inside a picture frame. Both the length and width of the frame are 2x inches

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the perimeter of the square is just "(5+2x)(2)+(7+2x)(2)

Step-by-step explanation:

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