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3 years ago

PLLLLLLLLLLZZZZZZZZZ

Mathematics

2 answers:

Bogdan [553]3 years ago

7 0

Answer: 4m + 3

Step-by-step explanation:

4m references the 4 bags of marbles and the m marbles in each bag. + 3 references the extra 3 marbles.

faltersainse [42]3 years ago

5 0

Answer:

4m + 3

Step-by-step explanation:

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Molodets [167]

Answer:

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Step-by-step explanation:

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2 years ago

Element X decays radioactively with a half-life of eight minutes. If there are 800 g of element X, how long, to the nearest 10th

Harman [31]

Answer: 41.5 min

Step-by-step explanation:

This problem can be solved with the Radioactive Half Life Formula:

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=22 g$ is the final amount of the radioactive element

$A_{o}=800 g$ is the initial amount of the radioactive element

$t$ is the time elapsed

$h=8 min$ is the half life of the radioactive element

So, we need to substitute the given values and find $t$ from (1):

$22 g=(800 g) 2^{\frac{-t}{8 min}}$ (2)

$\frac{22 g}{800 g}=2^{\frac{-t}{8 min}}$ (3)

$\frac{11}{400}=2^{\frac{-t}{8 min}}$ (4)

Applying natural logarithm in both sides:

$ln(\frac{11}{400})=ln(2^{\frac{-t}{8 min}})$ (5)

$-3.593=-\frac{t}{8 min}ln(2)$ (6)

Clearing $t$ :

$t=41.46 min \approx 41.5 min$ This is the time elapsed

7 0

2 years ago

What’s the answer to 3x/x+5+7/x+5

uranmaximum [27]

Ambiguous expression. I think you meant:
3x + 7
3x/(x+5)+7/(x+5) = --------------
x+5

There's no "answer." All you can do here is to combine the terms and simpify the resulting sum.

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3 years ago

What is the area of the polygon given below?

Julli [10]

You didn’t add a picture !

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2 years ago

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Vedmedyk [2.9K]

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Step-by-step explanation:

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1 year ago