Simplify.

A. -2
B. -4
C. 4
D. 2

Answer: A

Mathematics

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Find the special products using patterns.(5a + 9c)(5a - 9c)

A. 25a2 - 81c2 B. 25a2 + 90ac - 81c2 C. 5a2 - 9c2 D. 25a2 - 90ac - 81c2

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Simplify by combining like terms.22.2x - 7.8 - 8.4x + 14.3

A. 13.8x + 6.5 B. 14.8x + 6.5 C. 13.8x + 7.5 D. 20.3x

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Provide an appropriate response.Explain why the sum  +  -  can be simplified quickly.

What will be an ideal response?

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Find the standard form of the equation of the ellipse with the following characteristics. ? foci: , major axis of length: 22    ? ?

A.
B.
C.
D.
E.

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