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galben [10]
3 years ago
13

Find the value of x in the figure

Mathematics
2 answers:
kvv77 [185]3 years ago
8 0

Answer:

I am 99% sure it's x = 100°, here's why (down)

Step-by-step explanation:

The total is 180°. When adding 57° + 23° = 80°. To get x, you have to subtract 80° from 180°. The difference is 100°, which is the answer of this problem.

Lemur [1.5K]3 years ago
3 0
X= 100°
180° - 57° = 123
x + 23°= 123°
x = 100°
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solniwko [45]

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Step-by-step explanation:

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What's the volume and surface area of these two cylinders?
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Find the dimensions of the rectangle with area 256 square inches that has minimum perimeter, and then find the minimum perimeter
mezya [45]

Answer:

Dimensions: A=a\cdot b=256

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Step-by-step explanation:

This is a problem of optimization with constraints.

We can define the rectangle with two sides of size "a" and two sides of size "b".

The area of the rectangle can be defined then as:

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This is the constraint.

To simplify and as we have only one constraint and two variables, we can express a in function of b as:

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We can express the diameter as:

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To optimize we can derive the function and equal to zero.

dP/da=2+2\cdot (-1)\cdot\frac{256}{a^2}=0\\\\\frac{512}{a^2}=2\\\\a=\sqrt{512/2}= \sqrt {256} =16\\\\b=256/a=256/16=16

The minimum perimiter happens when both sides are of size 16 (a square).

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