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Math Help - Can someone correct my homework

  1. #1
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    Can someone correct my homework

    1) Given that f(x) = x3- x2 + 2x, what is f(-3)?

    A. -42

    B. 12

    C. -24

    D. 30

    2) Find the slope of the line passing through (-3, -4) and(3, -2).

    A. -3

    B. 3

    C. -(1/3)

    D. 1/3

    3) If a ball is thrown upwards at 20 ft/sec, the height hafter t seconds is given by h = -16t2+ 20t.

    How many seconds does it take for the ball to reach itsmaximum height, and what is this height?

    A. time = 5/16 seconds
    height = 5 and 1/8 feet

    B. time = - 5/8 seconds
    height = 6 and 1/4 feet

    C. time= 5/8 seconds
    height =6 and 1/4 feet


    D. time = - 5/16 seconds
    height = 5 and 1/8 feet


    4) Solve 4x + 8y = 7 3x + 4y = 6

    A.(5/2, -3/8)
    B. (5/2, 3/8)
    C. (-5/2, -3/8)
    D. (-5/2, 3/8)


    5) If x is the number of days elapsed, the supply of acertain item is y = 3x + 8 If demand is given by y = 4x, in how many days willsupply equal demand?


    A. 12 days
    B. 8days
    C. 10 days
    D. 6 days






    6)Write 657 in Roman numerals (use all capital letters).

    DCLVII

    7) MMXCV in decimal form is 2095.

    True
    False

    8)Convert the base 10 number 33 to base 5.
    133


    (leave off the notation of base 5 in your answer)


    9) Add 632base 8 + 46base 8 in the octal system (leave offthe notation of base 8 in your answer).
    I don’tknow


    10) Change to decimal notation: 143base 5
    .0045
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  2. #2
    MHF Contributor
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    North Texas
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    Re: Can someone correct my homework

    Quote Originally Posted by anto11434 View Post
    1) Given that f(x) = x3- x2 + 2x, what is f(-3)?

    A. -42

    B. 12

    C. -24

    D. 30

    2) Find the slope of the line passing through (-3, -4) and(3, -2).

    A. -3

    B. 3

    C. -(1/3)

    D. 1/3

    3) If a ball is thrown upwards at 20 ft/sec, the height hafter t seconds is given by h = -16t2+ 20t.

    How many seconds does it take for the ball to reach itsmaximum height, and what is this height?

    A. time = 5/16 seconds
    height = 5 and 1/8 feet

    B. time = - 5/8 seconds
    height = 6 and 1/4 feet

    C. time= 5/8 seconds
    height =6 and 1/4 feet


    D. time = - 5/16 seconds
    height = 5 and 1/8 feet


    4) Solve 4x + 8y = 7 3x + 4y = 6

    A.(5/2, -3/8)
    B. (5/2, 3/8)
    C. (-5/2, -3/8)
    D. (-5/2, 3/8)

    5) If x is the number of days elapsed, the supply of acertain item is y = 3x + 8 If demand is given by y = 4x, in how many days willsupply equal demand?

    A. 12 days
    B. 8days
    C. 10 days
    D. 6 days

    6)Write 657 in Roman numerals (use all capital letters).

    DCLVII


    7) MMXCV in decimal form is 2095.

    True
    False

    8)Convert the base 10 number 33 to base 5.
    133
    (leave off the notation of base 5 in your answer)


    9) Add 632base 8 + 46base 8 in the octal system (leave offthe notation of base 8 in your answer).
    I don’tknow

    10) Change to decimal notation: 143base 5
    .0045
    of the three you gave a solution for ...

    #6 is correct

    #8 is incorrect

    #10 is incorrect
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