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strojnjashka [21]
3 years ago
15

In the afternoon, a television station reported the temperature as 3.7°F . That evening, they reported the temperature as −1.5°F

.
Which expression represents the total temperature change from afternoon to evening?
A:
|−1.5+3.7|

B:3.7+(−1.5)

C:|3.7−(−1.5)|

D:−1.5+3.7
Mathematics
2 answers:
fgiga [73]3 years ago
7 0

Answer:

i am in k12.com online school and i just took the test.

the answer is 3.7−(−1.5).

hope it helped

3.7−(−1.5) is the answer.  

Yakvenalex [24]3 years ago
7 0

Answer:

just finished the test its c. :)

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You are designing a rectangular garden. the garden will be enclosed by fencing on three sides and by a house on the fourth side.
RUDIKE [14]
Suppose the dimensions of the rectangle is x by y and let the side enclosed by a house be one of the sides measuring x, then the sides that is to be enclosed are two sides measuring y and one side measuring x.

Thus, the length of fencing needed is given by

P = x + 2y

The area of the rectangle is given by xy,

i.e.

xy = 288  \\  \\  \\  \\ \Rightarrow y= \frac{288}{x}

Substituting for y into the equation for the length of fencing needed, we have

P=x+2\left( \frac{288}{x} \right)=x+ \frac{576}{x}

For the amount of fencing to be minimum, then

\frac{dP}{dx} =0 \\  \\ \Rightarrow1- \frac{576}{x^2} =0 \\  \\ \Rightarrow \frac{576}{x^2} =1 \\  \\ \Rightarrow x^2=576 \\  \\ \Rightarrow x=\sqrt{576}=24

Now, recall that

y= \frac{288}{x} = \frac{288}{24} =12

Thus, the length of fencing needed is given by

P = x + 2y = 24 + 2(12) = 24 + 24 = 48.

Therefore, 48 feets of fencing is needed to enclose the garden.
8 0
3 years ago
HELP ASAP!! Justify the answer to the equation by explaining the steps you took.
babymother [125]

Step-by-step explanation:

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2 years ago
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Rzqust [24]

Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:


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3 years ago
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iren [92.7K]

Answer:

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4x - 4 = 12.

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8 0
2 years ago
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