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agasfer [191]
2 years ago
15

Calculate the value of 3a – 4b + 6c – 3d, when a = 5 b = 4 c = 3 d = 2

Mathematics
1 answer:
Ne4ueva [31]2 years ago
3 0

Answer:

3a – 4b + 6c – 3d

when a = 5 b = 4 c = 3 d = 2

the value

= 3×5 - 4×4 + 6×3 - 3×2

=15-16+18-6

=11

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The population of a certain community is known to increase at a rate proportional to the number of people present at time t. If
attashe74 [19]

Answer:

t=7.85 years

Step-by-step explanation:

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\frac{dP}{dt}=aP

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\frac{dP}{P}=adt

Integrating each side of the equation.

\int \frac{dP}{P}=\int adt

ln(P)=at+c

P=e^{at+c}

P=e^{c}e^{at}=Ce^{at}

To find C we need to use the initial condiction, it means evaluae P at t=0.

P_{0}=Ce^{0}=C

P=P_{0}e^{at}

Now, we use the sentence  the population has doubled in 5 years.

2P_{0}=P_{0}e^{a5}

We can find "a" in this condition.

2=e^{a5}

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a=\frac{ln(2)}{5}

a=0.14

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3P_{0}=P_{0}e^{0.14t}

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If p and q are both true, then which of the following statements has the same truth-value as ~p → q?
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\neg P \lor\neg Q = F \lor F = F

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P \land \neg Q = T \land F = F

So this is not the right option.

D) Finally, the last one is again an implication, and again it starts with false:

\neg Q \implies P = F \implies T = T

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Step-by-step explanation:

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