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Liula
1 month ago
9

Write the standard form of the line that contains a slope of -3/8 and passes through the point (5, -4). Include your work in you

r final answer. Type your answer in the box provided or use the upload option to submit your solution.

Mathematics
2 answers:
AnnZ [12.3K]1 month ago
6 0

Response: 3x+8y+17=0

Detailed explanation:

The formula for a line passing through a designated point (a,b) with slope 'm' is established as follows:

(y-b)=m(x-b)

Given: Slope: m=\dfrac{-3}{8}

Point = (5, -4)

Thus, the equation for the line passing through the point (5, -4) with slope \dfrac{-3}{8} is defined as:

(y-(-4))=\dfrac{-3}{8}(x-5)\\\\\Rightarrow\ 8(y+4)=-3(x-5)\\\\\Rightarrow\ 8y+32=-3x+15\\\\\Rightarrow\ 3x+8y+32-15\\\\\Rightarrow\ 3x+8y+17=0\ \ [\text{In standard form}]

Consequently, the standard form for the line with a slope of \dfrac{-3}{8} passing through (5, -4) is:

3x+8y+17=0

zzz [12.3K]1 month ago
6 0
The answer with the work has been provided previously.
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The temperature, H, in degrees Celsius, of a cup of coffee placed on the kitchen counter is given by H = f(t), where t is in min
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Response:

a

    f'(t) is negative

b

 The unit is degC/min

c

At 35 minutes since the coffee was placed on the counter, the temperature is 68, and it will drop by approximately 0.75 in the next 30 seconds.

Detailed explanation:

According to the question, we are informed that

   The temperature of a cup of coffee on a counter is represented by the equation

         H= f(t)

where t indicates the time in minutes since the coffee was set on the counter.

In general, f(t)' denotes the derivative of f(t), indicating the change in temperature over time for the coffee

As the coffee rests on the counter, its temperature tends to decrease after a few minutes; thus, f(t)' is negative.

The temperature is measured in degrees Celsius while time is expressed in minutes.

Therefore, the change in temperature with respect to time, f(35)', will be given in degrees Celsius per minute (i.e., degC/min).

The question states that

        |f(35)'| = 1.5

which means the rate of temperature change after 35 minutes is 1.5.

And

         |f(35)| = 68

indicating that the coffee's temperature after 35 minutes is 67 degrees Celsius.

Subsequently, after another t= 30 seconds = \frac{30}{60}= 0.5 \ minutes the rate at which the coffee's temperature changes is

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=>        R = 1.5 * 0.5

=>        R = 0.75    

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Detailed explanation:

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