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18 Nov 2019


I have started on this problem but not sure if my answer is right. If anyone can help. thanks

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Hubert Koch
Hubert KochLv2
29 Sep 2019
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1-11，12b）d），17-18

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    I needed help with all of these not just one please and thank you.

    Show transcribed image text

    1. Evaluate the expression 2x - 2 for the value of x = -3

    2. Factor: xsquare + 4x - 32 (x-4)(x+8) (x-4)(x-8) (x-4)(x-8) (x-16)

    3. Factor: xsquare - 25 (x-5) (x+5)2 (x+5)(x-5) (x-5)(x-5)

    4. Evaluate -u2v3 when u=4 and v=-2 128 64 32 -128

    5. Using an online calculator, determine whether the value of x=7 is a solution of the equation. x Yes No

    6. Explain why x=7 IS or IS NOT a solution of the equation. 7 + 1/x+2=8

    7. Solve the equation and check your solution: -2 - 4x = 30

    8. Solve the equation and check your solution: 67x - 24 = 3x + 8(8x - 3) 67 -3 -67 All real numbers

    9. Solve the equation and check your solution. 5x/2 - x/6 = 14 10 6 7 9

    10. Solve the quadratic equation by factoring: xsquare - 6x + 5 = 0 -1, 5 -1,-5 1,-5 1,5

    11. The imaginary number i represents:

    12. Find real numbers a and b such that the equation is true: a+ bi = 14 + 2i a=16, b=4 a=18, b=6 a=14, b=2 a=15, b=14

    13. Find all solutions to the following equation. /4x - 8 = /4x + 9 x = -17/4 x=9 No solution x=-17

    14. In a given amount of time, James drove twice as far as Rachel. Altogether they drove 120 miles. Write an equation to help find the number of miles driven by each. Use R as the variable to represent miles driven by Rachel and J for James’ miles.

    15. Karen works for $10 an hour. A total of 25% of her salary is deducted for taxes and insurance. She is trying to save $450 for a new set of tires. Write an equation to help determine how many hours she must work to take home $450 if she saves all of her earnings. Be sure to save the equation you write, as you will use it to answer the next question in this quiz. 10h - .25=450 10h + .25(10h)=450 h -.25 (10h)=450 10h - .25(10h)=450

    16. Using the equation you wrote in the previous problem, find the actual amount of hours Karen must work to take home $450 if she saves all of her earnings. Show your work. 17. The length of a rectangular map is 15 inches and the perimeter is 50 inches. Find the width. Hint: Perimeter = width + length + width + length

    18. Twice a number is added to the number and the answer is 80. Write an equation to solve this problem. 2n + n=80 2n = 80 2n + 80=n 80 + n=2n

    19. If 4 is subtracted from twice a number, the result is 10 less than the number. Write an equation to solve this problem. Use n as the variable to represent the number.

    20. Multiply the following binomials: (x + 5)(x - 5)

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