3 years ago

What is the value of -91/5 - 10 + 2/5+ 2(14 1/2-7)

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

5 0

Answer:

Exact Form:

−64/5

Decimal Form:

−12.8

Mixed Number Form:

−12 4/5

Step-by-step explanation:

bc I used a calculator

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miss Akunina [59]

Answer:

E = 58

F = 32

G = 90

Step-by-step explanation:

3x + 31 + 5x -13 + 90 = 180

3x + 31 + 5x -13 = 90

8x = 90 - 31 + 13

8x = 72

x = 72 / 8

x = 9

E = 3(9) + 31 = 27+31 = 58

F = 5(9)-13 = 45 - 13 = 32

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a 23 gram sample of a substance thats a by-product of fireworks has a K-value of .13. whats the substances half life in days

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Given:
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Decay constant, k = 0.13

Exponential decay obeys the equation
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Therefore
$e^{-0.13t} = \frac{1}{2} \\ -0.13t = ln(0.5)\\t= \frac{ln(0.5)}{-0.13} =5.33$

Answer: The half life is 5.33 days

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mixer [17]

Answer:

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Step-by-step explanation:

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