Math

1. Add or subtract.
(4x^2 + 15x -3) - (-3x^2 + 5)
A. 7x^2 + 15x - 8
B. x^2 + 12x + 2
C. x^2 + 15x - 8
D. 7x^2 + 8
2. Simplify the polynomial.
-3f^2 + 4f - 3 + 8f^2 + 7f + 1
A. 5x^2 - 4x - 2
B. -5x^2 + 8x - 2
C. 5x^2 - 8x + 2
D. -9x^2 - 8x + 2
3. Add or subtract.
(2x^2 + 6x + 1) + (-7x^2 + 2x - 3)
A. 5x^2 - 4x - 2
B. -5x^2 + 8x - 2
C. 5x^2 - 8x + 2
D. -9x^2 - 8x + 2
4.Name the coefficients in the polynomial.
4x^2 + 3x - 3
A. 4, -3, -3
B. 4, 3
C.4,3,3
D. -4, -3

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  1. 1A

    what did you get for the others?

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  2. 2. C
    3. B
    4. I'm not sure.

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  3. #2 f? x? I get 5f^2 + 11f - 2

    #3 B

    #4 coefficients are the numbers multiplying the powers of x. So, B
    the final -3 is not a coefficient; it's just a constant.

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  4. 1. (4x^2 + 15x - 3) - (3x^2+5) =
    4x^2 + 15x - 3 - 3x^2 - 5 = x^2 + 15x - 8.

    2. -3f^2 + 4f - 3 + 8f^2 + 7f + 1 = 5f^2 + 11f - 2.

    3. Ans: b.

    4. Ans: b.

    5. Ans: a.

    6. Ans: -7.

    7. 2^2 * 2^8 = 2^10.

    8. (2.5*10^4)(4*10^3) = 10*10^7 = 1*10^8.

    9. When multiplying, add the exponents:
    5^2*5^9 = 5^11.
    5^3*5^8 = 5^11.
    5^4*5^7 = 5^11.

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  5. How do you get the ^ symbol on a keyboard @Connexus answers for unit test

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  6. shift and press 6

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  7. Connexus answers got all right except 1 is A at least on mine.

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  8. I got the same as Yanni the first question is a :)

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