Plssss helppppp and thanks you if answers are actually true then I give brain:)

Mathematics

1 answer:

san4es73 [151]3 years ago

7 0

The 3rd one and the last one.

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Evaluate the expression9!/3!

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The answer to 9!/3! Is 60480

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Element X is a radioactive isotope such that every 25 years, its mass decreases by half. Given that the initial mass of a sample

Julli [10]

50*(.5)^(23/25)=26.43

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What is the sum of 6 feet 10 inches and 8 feet 9 inches?

vivado [14]

Lets first convert everything to inches.

6 feet= 12*6 = 72 + 10 = 82 inches
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Now add!

82+105 = 187

Now convert them back to feet.

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Read 2 more answers

Some students are working together to draw a picture of a playground.

vodomira [7]

From the information provided by the statement, you know that

*Ann draws 2/16 of the playground

*Susan draws 6/16 of the playground because she draws 3 times as much as Ann so

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*Louise draws 3/16 because she draws half as much as Susan, so

$\frac{1}{2}\cdot\frac{6}{16}=\frac{6}{32}=\frac{2\cdot3}{2\cdot16}=\frac{3}{16}$

*Sam draws 2/16 because she draws 1 less section than Louise

$\frac{3}{16}-\frac{1}{16}=\frac{2}{16}$

Now, let x be the fraction of the playground that still needs to be drawn. Then, you have

$\begin{gathered} \frac{2}{16}+\frac{6}{16}+\frac{3}{16}+\frac{2}{16}+x=\frac{16}{16} \\ \text{ Add similar terms} \\ \frac{13}{16}+x=\frac{16}{16} \\ \text{ Subtract }\frac{13}{16}\text{from both sides of the equation} \\ \frac{13}{16}-\frac{13}{16}+x=\frac{16}{16}-\frac{13}{16} \\ x=\frac{3}{16} \end{gathered}$

Therefore, 3/16 of the playground still needs to be drawn.

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1 year ago

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Yes,no,no i think hope this helps.

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3 years ago