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insens350 [35]
3 years ago
14

The side length of a square is shown. Which expressions are equal to the perimeter of the square?(w-2)  Select all that are corr

ect. 2(w – 2) + 2(w – 2) w + w + w + w – 2 – 2 – 2 – 2 4w – 2 2w – 4 4(w – 2)
Mathematics
1 answer:
garik1379 [7]3 years ago
6 0
For this..all we are doing is adding (w-2) leaving a few options for answers

2(w-2) +2(w-2)
w+w+w+w-2-2-2-2
4(w-2)
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The temperature at a point (x, y) is T(x, y), measured in degrees Celsius. A bug crawls so that its position after t seconds is
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Answer:

The rate of change of temperature is 1.29 degree Celsius per second.  

Step-by-step explanation:

We are given the following information in the question:

The temperature at a point (x, y) is T(x, y), measured in degrees Celsius where x and y are measured in centimeters.

x = \sqrt{2+t}\\\\y = 5 + \displaystyle\frac{1}{14}t

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\displaystyle\frac{dT}{dt} = \frac{dT}{dx}\frac{dx}{dt} + \frac{dT}{dy}\frac{dy}{dt}\\\\\displaystyle\frac{dT}{dt} = T_x(x,y)(\frac{1}{2\sqrt{2+t}}) + T_y(x,y)\frac{1}{14}\\\\At~ t = 14, x = 4, y = 6\\\\\frac{dT}{dt} = T_x(4,6)(\frac{1}{2\sqrt{2+t}}) + T_y(4,6)\frac{1}{14}\\\\\frac{dT}{dt} = 8\times \frac{1}{8} +4\times \frac{1}{14} = 1 + 0.2857 = 1.2857

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