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Vinvika [58]
4 years ago
13

How many solutions does this equation have? -7k-2=-9k+10

Mathematics
1 answer:
inysia [295]4 years ago
5 0

Answer: k = 6

Step-by-step explanation: only one solution

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Suppose that in 6 minutes, 54 gallons of water came out of a pipe. What was the rate in gallons per minute?
NikAS [45]

Answer:

9 gallons per minute

Step-by-step explanation:

If there are 54 gallons that came out of a pipe within 6 minutes, then we divide 54 by 6 to get how many would come out in 1 minute.

54/6 = 9.

6 0
3 years ago
Solve as a difference equation.
zhannawk [14.2K]

Solution :

Let y = amount of caffeine at a given time in body.

n = number of hours

So $\frac{dy}{dn}= - \ Y$

$\Rightarrow \frac{dY}{Y}=- 0.01 \ dn

ln Y = -0.01 n + C

At n = 0, Y = 130 mg

ln 130 = -0.01 x 0 + C

C = ln 130

$ \ln \frac{Y}{130} =- 0.01 \ n$

$Y = 130 \ e^{-0.01n}$

When Y = 65

$65 = 130 \ e^{-0.01 n }$

$\frac{65}{130}=e^{-0.01n}$

$\ln \frac{1}{2} = -0.01 \ n$

n = 69.315 hours

At n = 24 hours

$Y = 130 \ e^{-0.01 \times 24}$

Y = 102.26 mg

8 0
3 years ago
PLEAS HELP ME!!!!!!!!!!!!!!!!Use a unit rate to find the unknown value. <br> 52/13, 12/?
Nostrana [21]

Answer: 3

Step-by-step explanation:

52/13 can be simplified to 4. what do you have to put under 12 so it can simplify to 4? The answer is 3.

5 0
3 years ago
3x(x + 3) = 8<br> Solve the equation
adoni [48]

Answer:

if your simplifying it is 3x^2 + 9x

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
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Korolek [52]

Answer:

44.588

Step-by-step explanation:

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6 0
2 years ago
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