Math!

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1) What is the value of 19 + 5a^4 + 3b^2 when a = 2 and b = -4?
(this is not a multiple choice question) but my answer is 147.

2)Combine the like terms to simplify the expression: 4 + 7xy^2 + 5y^3 + 10x -4xy^2 - 8x - 4y^3 + 9
- y^6 + 3x^2y^2 + 10x + 13
- y^3 + 3xy^2 + 2x + 13
- y^3 + 3xy^2 + 10x + 13 *my answer*
- y^3 - 3xy^2 + 2x + 9
3) Which is equal to 4^2 x 4^8
- 4^16
- 4^10 *my answer*
- 4^6
- 4^-6

  • Math! -

    1) 19 + 5 (16) + 3(16) = 19 + 80 + 48 = 147 (agree)

    2) y^3 + 3xy^2 + 2x +13

    10x -8x = 2x

    3) Right

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