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Marat540 [252]
3 years ago
12

I need the answers for this question.

Mathematics
1 answer:
nadya68 [22]3 years ago
7 0

Answer:

7

Step-by-step explanation:

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6 = a divided by 4 + 2
lyudmila [28]

Answer:

36

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Are the following lines parallel perpendicular or neither: x=6 and x=12
suter [353]

Answer:

Not Parallel

Step-by-step explanation:

I think so sorry If I'm wrong

5 0
3 years ago
What value of x is in the solution set of -5x - 15 > 10 + 20x?​
Georgia [21]

Answer:

-1>x

Step-by-step explanation:

-5x - 15 > 10 + 20x

Add 5x to each side

-5x+5x - 15 > 10 + 20x+5x

-15> 10+25x

Subtract 10 from each side

-10 - 15 > 10-10 + 25x

-25> 25x

Divide each side by 25

-25/25> 25x/25

-1>x

3 0
3 years ago
We take a milk carton from the refrigerator and put it on the table at room temperature. We assume that the temperature of the c
Kisachek [45]
We can solve this problem using separation of variables.

Then apply the initial conditions

EXPLANATION

We were given the first order differential equation

\frac{dT}{dt}=k(T-a)

We now separate the time and the temperature variables as follows,

\frac{dT}{T-a}=kdt

Integrating both sides of the differential equation, we obtain;

ln(T-a)=kt +c

This natural logarithmic equation can be rewritten as;

T-a=e^{kt +c}

Applying the laws of exponents, we obtain,

T-a=e^{kt}\times e^{c}

T-a=e^{c}e^{kt}

We were given the initial conditions,

T(0)=4

Let us apply this condition to obtain;

4-20=e^{c}e^{k(0)}

-16=e^{c}

Now our equation, becomes

T-a=-16e^{kt}

or

T=a-16e^{kt}

When we substitute a=20,
we obtain,

T=20-16e^{kt}

b) We were also given that,

T(5)=8

Let us apply this condition again to find k.

8=20-16e^{5k}

This implied

-12=-16e^{5k}

\frac{-12}{-16}=e^{5k}

\frac{3}{4}=e^{5k}

We take logarithm to base e of both sides,

ln(\frac{3}{4})=5k

This implies that,

\frac{ln(\frac{3}{4})}{5}=k


k=-0.2877

After 15 minutes, the temperature will be,


T=20-16e^{-0.2877\times 15}

T=20-0.21376


T=19.786

After 15 minutes, the temperature is approximately 20°C


6 0
3 years ago
What is the slope below
pantera1 [17]

Answer:

-1

Step-by-step explanation:

We can find the slope by the change in y over the change in x

change in y = down 3   which is -3

change in x = to the right 3 = 3

change in y/ change in x = (-3/3) =-1

7 0
3 years ago
Read 2 more answers
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