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Mkey [24]
2 years ago
6

Two pens and one eraser cost $35 and three pens and four erasers cost $65. Find the cost of the pencil and eraser separately.

Mathematics
1 answer:
Nikitich [7]2 years ago
3 0

Answer:

Pencil is $15 and erasers are $5

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4 years ago
the number of buckets of paint n needed to paint a wall varies jointly with the total area a and the thickness t of the wall, an
Nat2105 [25]
The number of buckets is directly proportional to the area and the thickness of the wall and inversely proportional to the amount of paint. Mathematically, we can write:

n = k · (a · t) / p

where k is the proportionality constant which we do not know.

We can calculate k with the given data: 5 2-gallon buckets, area of 100 square feet and thickness 3 inches:

k = (n · p) / (<span>a · t)
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Now that we know the constant, we can calculate the area that can be painted with 8 2-gallon buckets if the thickness is 6 inches:

a =  (n · p) / (k<span> · t)
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Please, note that we made sure to have the exact same units of measurements than the previous case.

Therefore, the correct answer is an area of 80 ft².
4 0
3 years ago
(5*10^-2)divide by (2*10^3)
DaniilM [7]

Answer:

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6 0
3 years ago
Round 24,299 to the nearest thousand
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1- I didn't understand it

2).. (a/b)² (a/b)⁸

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d/dx (x/y) = (1/y)
d/dx (1/y) = 0

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5 0
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