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24 April, 02:50

Evaluate 2x - 4 for x = 9. Evaluate - b + 8 for b = 3. Find the value of the expression 12x+3 if x = 12. For the equation y = 3x + 4, find the value of y if x = 2. The expression $25 + $10h gives the amount of money that Stephanie earns per day, where h is the number of hours she works. How much does she earn if she works 4 hours? Simplify each of the following expressions: 3 (x + 2) + 4 (x - 2) 2 (x + y) - 3 (x + y) - (y + 8) + 4 (6 - y) 2 (4x + 3) - 3 (x + 1)

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  1. 24 April, 02:53
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    Answers are below and bolded for you. Questions are underlined.

    Step-by-step explanation:

    Evaluate 2x - 4 for x = 9.

    2*9-4=

    18-4=

    16

    Evaluate - b + 8 for b = 3.

    -3+8=

    5

    Find the value of the expression 12x+3 if x = 12.

    12*12+3=

    144+3=

    147

    For the equation y = 3x + 4, find the value of y if x = 2.

    y=3*2+4

    y=6+4

    y=10

    The expression $25 + $10h gives the amount of money that Stephanie earns per day, where h is the number of hours she works. How much does she earn if she works 4 hours?

    If she works 4 hours, our equations is now:

    $25+$10*4=

    $25+$40=

    $65

    Simplify each of the following expressions:

    3 (x + 2) + 4 (x - 2) =

    3x+6+4x-8=

    7x-2

    2 (x + y) - 3 (x + y) - (y + 8) + 4 (6 - y) =

    2x+2y-3x+3y-y+8+24-y=

    -x+2y+3y-y+8+24-y=

    -x+4y+8+24-y=

    -x+3y+32 or 32-x+3y

    2 (4x + 3) - 3 (x + 1) =

    8x+6-3x+3=

    5x+9
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