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sammy [17]
3 years ago
10

A woodworker made 60 decorative shelves to sell at a fair. 30% of the

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
6 0

18 shelves he needs to sell

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1,2,4,7,11,16,22, ___,____<br> What is the rule?
Paha777 [63]
Find rates of change until you find a constant.

dy/dx=1,2,3,4,5,6

d2y/dx2=1,1,1,1,1  

So the acceleration, d2y/d2x, is constant.  This means that this is a quadratic sequence of the form a(n)=an^2+bn+c.  So we can set up a system of equations to solve for the values of a,b, and c.  Using the first three points, (1,1), (2,2), and (3,4) we have:

9a+3b+c=4, 4a+2b+c=2, and a+b+c=1  getting the differences...

5a+b=2 and 3a+b=1  and getting this difference...

2a=1, so a=1/2 making 5a+b=2 become:

2.5+b=2, so b=-1/2, making a+b+c=1 become:

1/2-1/2+c=1, so c=1  so the rule is:

a(n)=0.5x^2-0.5x+1  or if you prefer to not have decimals

a(n)=(x^2-x+2)/2
6 0
3 years ago
Read 2 more answers
What's the slope of (-5, 10) and (-2, -2)?
3241004551 [841]

Answer:

slope: -4

equation: y = -4x – 10

4 0
3 years ago
Find the area of a regular decagon with perimeter 100 units. Show all work.
Slav-nsk [51]
A regular polygon has ten (10) equal sides ( since it is regular).
We are given with the perimeter value which is 100 units and the perimeter formula is P = 10a
Solving for a (the side measurement), we have:
100 = 10a
a= 100/10
a =10

We can now proceed in solving the area and the formula is shown below:
Area = 5/2 a√ (5+2√5)
Area = 5/2 * 10√(5+2√5)
Area = 76.94 square units

The answer is 96.94 square units.
4 0
3 years ago
Using the chart below, determine which option would be the cheapest overall? Option Number of Months Down Payment Interest Rate
Gekata [30.6K]

Answer:

Answer:

Option 1, by $851.70

Step-by-step explanation:

Option 1 total:

$8000 + $765.44*5*12 = $53926.40

Option 2 total:

$8000 + $626.25*4*12 + 0.38*$43995 = $54778.10

The difference:

$54778.1 - $53926.40 = $851.70

As we see the option 1 is cheaper by $851.70

Correct answer choice is the last one

Step-by-step explanation:

8 0
2 years ago
Guys I rly need help. DUE SUPER SOON!
masya89 [10]

Answer:

Answer is B hope this helps

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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