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3 years ago

5=-1(4)x+b I need the help pleasee and thank youu!!

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

8 0

Answer:

The answer is "b=5+4x".

Step-by-step explanation:

Given:

$\bold{5=-1(4)x+b}\\\\$

Simplify:

$\to 5=-1(4)x+b\\\\\to 5=-4x+b\\\\\to 5+4x=b\\\\$

The final value of b is "4x+5", and please find the attachment to this question.

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HELP!!!! If a scale of 2 in:10 ft is used, how long is an object that is 14 in. long

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Answer: 70 feet
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3 years ago

Use the exponential decay model, Upper A equals Upper A 0 e Superscript kt, to solve the following. The half-life of a certai

Akimi4 [234]

Answer:

It will take 7 years ( approx )

Step-by-step explanation:

Given equation that shows the amount of the substance after t years,

$A=A_0 e^{kt}$

Where,

$A_0$ = Initial amount of the substance,

If the half life of the substance is 19 years,

Then if t = 19, amount of the substance = $\frac{A_0}{2}$ ,

i.e.

$\frac{A_0}{2}=A_0 e^{19k}$

$\frac{1}{2} = e^{19k}$

$0.5 = e^{19k}$

Taking ln both sides,

$\ln(0.5) = \ln(e^{19k})$

$\ln(0.5) = 19k$

$\implies k = \frac{\ln(0.5)}{19}\approx -0.03648$

Now, if the substance to decay to 78% of its original amount,

Then $A=78\% \text{ of }A_0 =\frac{78A_0}{100}=0.78 A_0$

$0.78 A_0=A_0 e^{-0.03648t}$

$0.78 = e^{-0.03648t}$

Again taking ln both sides,

$\ln(0.78) = -0.03648t$

$-0.24846=-0.03648t$

$\implies t = \frac{0.24846}{0.03648}=6.81085\approx 7$

Hence, approximately the substance would be 78% of its initial value after 7 years.

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3 years ago

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satela [25.4K]

The answer is 0.9 here

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3 years ago

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Name:

Triss [41]

Answer:

Step-by-step explanation:

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3 years ago

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Justin is training for a hamburger eating competition. He is eventually able to eat 15 hamburgers in 10 minutes.

cluponka [151]

Importance must always be given to all the information's that are already given in the question. Based on those information's the answer to the question can be easily deduced.
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4 years ago

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