Math

For questions 2 and 3, simplify each polynomial.
2. 3x^2+6-2x+5x-4x^2+9
a. -x^2+3x+15
b. 7x^2+3x+3
c. x^2-3x+15
d. -x^2+7x+15

3. 4x^2+8x-11x+6-5x^2+2
a. -x^2-3x+8
b. -x^2+3x+8
c. x^2-3x+8
d. x^2+3x+8
Please, i need help with the Lesson 7: Polynomials and properties of exponents unit test. 8th grade, i need my grade up so i can get off probation. Please someone. Who has done the test... Help me?

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  1. anyone? I just need help...

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  2. I will do the 2nd one:

    3. 4x^2 + 8x - 11x + 6 - 5x^2 + 2
    remember , we can only add "like" terms, so
    do the x^2 terms, 4x^2 - 5x^2 = -x^2
    so we rule out choices c) and d), leaving a) and b)
    let's look at the x terms: +8x - 11x = -3x
    from the remaining a) and b), only b) has that.
    Finally, check that the constants are correct, 6+2 = 8
    Yup, it is b)

    now do the first one in the same way

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    Reiny
  3. thank you so much @Reiny

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  4. Please Help! You should always tell us what your answer is before you just say you need the answers. Im not giving you any because you didn't even try....

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  5. does anyone know the answers for the connections academy short answer questions for 8th grade math lesson 8 Init 5? i lowkey really need help

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  6. here are the questions
    17. A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 112 gold balls to the bag. He wants the ratio of white to striped golfballs to remain the same. How many of each should he add?

    18. The coordinates of quadrilateral VWXY are given below. Find the coordinates of its image after a dilation with the given scale factor
    V((6,2), W(-2,4), X(-3,-2), Y(3,-5), scale factor of 2

    19. Tell whether the pair of polygons is similar. Explain why or why not.
    PQ - 8ft
    QR - 13ft (this is for the bigger polygon)
    RS - 8ft
    SP - 13 ft

    (then it goes to the smaller polygon which is..)

    TU - 5.2 ft
    UV - 2.4
    VW - 5.2
    WT - 2.4

    PLEASE HELP

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