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3 years ago

Are there any solutions

Mathematics

1 answer:

Travka [436]3 years ago

8 0

Answer: B Exactly one solution

Step-by-step explanation:

5x+8-7x=-4x+1

-2x+8=-4x+1

-2x+4x=-7

2x=-7

x=-7/2

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3 years ago

Question 2 (2 points)<br> Subtract.<br> A) -18 - (-12) =<br> on &<br> 5

muminat

Answer:

-6

(I don’t understand what you mean by on & 5 but..)

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7 0

3 years ago

Read 2 more answers

Situation:A researcher in North America discoversa fossile that contains 65% of its originalamount of C-14..-ktN=NoeNo inital am

zheka24 [161]

SOLUTION

We have been given the equation of the decay as

$\begin{gathered} N=N_0e^{-kt} \\ where\text{ } \\ N_0=initial\text{ amount of C-14 at time t} \\ N=amount\text{ of C-14 at time t = 65\% of N}_0=0.65N_0 \\ k=0.0001 \\ t=time\text{ in years = ?} \end{gathered}$

So we are looking for the time

Plugging the values into the equation, we have

$\begin{gathered} N=N_0e^{-kt} \\ 0.65N_0=N_0e^{-0.0001t} \\ e^{-0.0001t}=\frac{0.65N_0}{N_0} \\ e^{-0.0001t}=0.65 \end{gathered}$

Taking Ln of both sides, we have

$\begin{gathered} ln(e^{-0.000t})=ln(0.65) \\ -0.0001t=ln(0.65) \\ t=\frac{ln(0.65)}{-0.0001} \\ t=4307.82916 \end{gathered}$

Hence the answer is 4308 to the nearest year

8 0

11 months ago

Hey!Can somebody help me please?

tia_tia [17]

Answer:

I only know the first one....

4+2+1=7

49p/7= 7p

4units:2units:1units

4×7p= 28p

2×7p= 14p

1×7p= 7p

divided it is...

28p:14p:7p

8 0

3 years ago