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SOVA2 [1]
3 years ago
11

Find the result when you subtract (5y+9z)to(4y-7z)A. -y-16zB.-y+16zC.9y+2zD.9y-2z​

Mathematics
1 answer:
natali 33 [55]3 years ago
6 0
A if it is (4y-7z) - (5y+9z).
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3 0
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Read 2 more answers
A culture started with 2000 bacteria after 5 hours it grew to 2600
Jobisdone [24]
P(t) = P₀ e^(kt) 

<span>Where P₀ is the initial population, </span>
<span>P(t) is the population after "t" time. </span>
<span>t is your rate (can be hours, days, years, etc. in this case, hours) </span>
<span>k is the growth constant for this particular problem. </span>

<span>So using the information given, solve for k: </span>

<span>P₀ = 2000 </span>
<span>P(4) = 2600 </span>

<span>P(t) = P₀ e^(kt) </span>
<span>2600 = 2000e^(k * 4) </span>
<span>1.3 = e^(4k) </span>

<span>Natural log of both sides: </span>

<span>ln(1.3) = 4k </span>
<span>k = ln(1.3) / 4 </span>

<span>Now that we have a value for "k", use that, the same P₀, then solve for P(17): </span>

<span>P(t) = P₀ e^(kt) </span>
<span>P(17) = 2000 e^(17ln(1.3) / 4) </span>

<span>Using a calculator to get ln(1.3) then to simplify from there, we get: </span>

<span>P(17) ≈ 2000 e^(17 * 0.262364 / 4) </span>
<span>P(17) ≈ 2000 e^(4.460188 / 4) </span>
<span>P(17) ≈ 2000 e^(1.115047) </span>
<span>P(17) ≈ 2000 * 3.0497 </span>
<span>P(17) ≈ 6099.4 </span>

<span>Rounded to the nearest unit: </span>

<span>P(17) ≈ 6099 bacteria  hope i could help =)))</span>
3 0
3 years ago
Hamburgers cost $2 and hotdogs cost $2. The total cost of buying b hamburgers and d hotdoge can be expressed by C=3b+2d. how can
sveticcg [70]
C= 3b + 2d
Subtract 3b first.

C-3b = 2d
Divide by 2.

C-3b/2 = d

OR

C-3b
-------- = d Your final answer!
2
3 0
3 years ago
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