2 years ago

Find all numbers whose absolute value is 7.

Mathematics

1 answer:

suter [353]2 years ago

4 0

Answer:

The absolute value of 7 is 7 and the absolute value of -7 is 7

7, -7

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A 5-meter ladder is leaning against the side of a house. The foot of the ladder is pulled away from the house at a rate of 0.4 m

Flura [38]

<h2>The top of the ladder is descending at 0.3 m/s.</h2>

Step-by-step explanation:

By Pythagoras theorem we know that

Hypotenuse² = Base² + Perpendicular²

h² = b² + p²

We have for ladder

h = 5 m

b = 3 m

5² = 3² + p²

p = 4 m

$\frac{db}{dt}=0.4m/s\\\\\frac{dh}{dt}=0$

Differentiating h² = b² + p² with respect to time

$2h\times \frac{dh}{dt}=2b\times \frac{db}{dt}+2p\times \frac{dp}{dt}\\\\5\times 0=3\times 0.4+4\times \frac{dp}{dt}\\\\\frac{dp}{dt}=-0.3m/s$

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2 years ago

Can someone please help me ..

Naddika [18.5K]

(0+1+2+3+4) /5 = 2
Hope this helps!

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2 years ago

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Schach [20]

Well I would solve it but where's the problem?

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the scale of a model train is 1 inch to 13.5 feet. One of the cars of the model train is 5 inches long. What is the lenght, in f

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Answer:

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Step-by-step explanation:

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