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astra-53 [7]
3 years ago
10

a 27-inch board is to be cut into three pieces so that the second piece is 3 times as long as the first piece and the third piec

e is 5 times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces
Mathematics
1 answer:
MrMuchimi3 years ago
5 0

<u>Step-by-step explanation:</u>

27 = x + 3x +5x

27 = 9x

3 = x

Board 1: (3)(1) = 3 inches

Board 2: (3)(3) = 9 inches

Board 3: (3)(5) = 15 inches

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Kobotan [32]

Answer:

The area between the two functions is approximately 1.333 units.

Step-by-step explanation:

If I understand your question correctly, you're looking for the area surrounded by the the line y = 2x and the parabola y = x², (as shown in the attached image).

To do this, we just need to take the integral of y = x², and subtract that from the area under y = 2x, within that range.

First we need to find where they intersect:

2x = x²

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So they intersect at (2, 4) and (0, 0)

Now we simply need to take the integrals of each, subtracting the parabola from the line (as the parabola will have lower values in that range):

a = \int\limits^2_0 {2x} \, dx - \int\limits^2_0 {x^2} \, dx\\\\a = x^2\left \{ {{x=2} \atop {x=0}} \right - \frac{x^3}{3}\left \{ {{x=2} \atop {x=0}} \right\\\\a = (2^2 - 0^2) - (\frac{2^3}{3} - \frac{0^3}{3})\\\\a = 2^2 - \frac{2^3}{3}\\a = 4 - 8/3\\a \approx 1.333

So the correct answer is C, the area between the two functions is 4/3 units.

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
Find the value of x when 2(x - 3) + 1 = 3x + 4
Sav [38]
Step 1. Expand

2x-6+1=3x+4

Step 2. Simplify 2x-6+1 to 2x-5

2x-5=3x-4

Step 3. Subtract  2x <span> from both sides

</span>-5=3x+4-2x

Step 4. Simplify 3x+4-2x to x+4

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Step 7. Switch sides

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