3 years ago

Use properties to find the sum 3 x 40 x 6

1 answer:

pogonyaev3 years ago

6 0

You take 3•4 to get 12, then you add a zero to that and get 120. You then multiply by six and get 720.

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MaRussiya [10]

Answer:C=15

Step-by-step explanation:

Just do math

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tatiyna

I think it is A because i think it is the only one that makes sense

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lianna [129]

You would divide 10.45 by .55 and you would get 19 so 19 is your answer hope this helps

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4 years ago

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

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

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

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3 years ago

podryga [215]

Commission is 2500
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4 years ago