3 years ago

Evaluate the number of permutations of 16 things taken 3 at a time.

Mathematics

1 answer:

arlik [135]3 years ago

3 0

I believe its 720 but I'm not 100% sure

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Donnel practiced the piano 3 hours longer than Marcus. Together they practiced the piano for 11 hours. How many hours did each b

andriy [413]

Here is the equation: $x+(x+3)=11$ ⇒ $x+x+3=11$

You need to get "x" by itself so minus 3 from each side

$x+x+3-3=11-3$ ⇒ $x+x=8$ ⇒ $2x=8$

Divide 8 by 2

$8$ ÷ $2=4$

x=4

So each 4 is equivalent to 4

Lets check:

$4+(4+3)=11$ ⇒ $4+4+3=11$ ⇒ $11=11$

So that means that Marcus practiced the piano for 4 hours and Donnel practiced for 7

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3 years ago

What is the product of the rational expression

Assoli18 [71]

$= \cfrac{2 \cdot 5}{(x+1) \cdot 3x} = \cfrac{10}{3x^2+3x}$

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2 years ago

Find the slope of the line passing through the points (1,-5) and (4,1).

e-lub [12.9K]

<h3>Answer:</h3><h3>The equation for the slope of a line, given two coordinate points, (x1,y1) , (x2,y2), is (y2-y1)/(x2-x1) </h3><h3> So we get slope = (1-(-5)) / (4-1) = 6/3 = 2</h3><h3>A is your correct answer.</h3>

Hope this helps! please consider marking my answer the brainliest :)

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3 years ago

Integers are ____ rational numbers<br><br> 1. always<br> 2. sometimes<br> 3. never

yaroslaw [1]

I dont think the answer is always. Because integers are always whole numbers. Hope that helps a little?

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3 years ago

Read 2 more answers

Lexi painted 2 faces in 8 minutes at the crafts fair.At this rate,how many faces can she paint in 40 minutes?

VLD [36.1K]

10 faces. 2:8 x:40 so 40÷8= 5 so x: 5x2 whixh is 10