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Kamila [148]
3 years ago
6

Use substitution to solve the system. x = 2y +13 - 2x + 3y = -21

Mathematics
1 answer:
il63 [147K]3 years ago
7 0
The answer is
(x,y) = (3,-5)
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A sphere with radius r and a cylinder with radius r and a height of r are shown below. How do the surface areas of these solid f
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Answer:

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Step-by-step explanation:

The surface area of the sphere is given by the formula ...

  A = 4πr^2

The surface area of the cylinder is given by the formula ...

  A = 2πr^2 +2πrh

Here, the height (h) is equal to r, so this simplifies to ...

  A = 2πr^2 +2πr·r = 4πr^2 . . . . . the same area as the sphere

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3 years ago
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What is the sum of the coefficients in the expression of 4x^4 - x^3 - 2x^2 + 3 - 4
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9514 1404 393

Answer:

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Step-by-step explanation:

The coefficients are the numerical values that are not exponents. Their sum is ...

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2 years ago
(Very easy) Find the volume. Round to the nearest tenth if necessary.
Pavel [41]

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π7^2

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