4 years ago

Add these fractions just pretend / means fraction

Mathematics

1 answer:

CaHeK987 [17]4 years ago

8 0

Answer is 16 1/3. hope that helps

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Subtract 7x+3 from 2x-7

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Subtract 7x+3 from 2x-7

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-5x -4

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3 years ago

Identify a3 of a sequence: 0.25, 0.5, 0.75, 1, 1.25, 1.5,....<br> a3=

wariber [46]

Answer:

0.75

Step-by-step explanation:

The given sequence is an AP , as the difference of all the terms is same

$a_3 = 0.75$

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4 years ago

Someone help me out. I swear I leanred how tro do this years ago but I guess I'm not that smart

guajiro [1.7K]

Answer:

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Step-by-step explanation:

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3 years ago

Which term best describes the system of equations?

Oduvanchick [21]

Answer:

coincident

Step-by-step explanation:

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3 years ago

Plutonium–238 has a yearly decay constant of 7.9 × 10-3. If an original sample has a mass of 15 grams, how long will it take to

eduard

The answer is 28 years

At = A0 * e^(-k * t)
At = 12 g
A0 = 15 g
k = 7.9 × 10^-3 = 0.0079
t = ?

12 = 15 * e^(-0.0079 * t)
12/15 = e^(-0.0079 * t)
0.8 = e^(-0.0079 * t)

Logarithm both sides (because ln(e) = 1:
ln(0.8) = ln(e^(-0.0079 * t))
ln(0.8) = (-0.0079 * t) * ln(e)
-0.223 = -0.0079 * t
t = -0.223 / -0.0079
t = 28.23
t ≈ 28 years

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3 years ago