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Algebra

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1. Evaluate. (8 – 3) (12 ÷ 2 • 2) – 20

Answer: I'm not sure if its -5 or 40

2. 6x – 7 = 5(x – 2)

Answer: -3

3. Solve for y. 3x – 2y = 12

Answer: 3x-12/2

4. Solve. –3(x – 3) + 8(x – 3) = x – 9

Answer: 1 1/2 or 1.5

5. Find the slope of the line passing through the points (8, 3) and (–2, 4).

Answer: -1/10

6. Find the slope of the line passing through the points (10, –4) and (–4, –4).

Answer: 0

7. A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the flying time for the second part of the trip?

Answer: 6hrs

8. Given f(x) = 2x2 – 3x + 5, find f(5).

Answer: 40

9. Rewrite the equation 4x – 2y = –6 as a function of x

Answer: f(x) = 2x + 3

10. Are the following lines parallel, perpendicular, or neither?
L1 with equation x – 2y = 10
L2 with equation 2x + y = 2

Answer: perpendicular

  • Algebra -

    1. 5*3 - 20 = -5
    2. right
    3. (3x-12)/2 need parenthesis
    4. –3(x – 3) + 8(x – 3) = x – 9
    -3x+9+8x-24=x-9
    4x = -42
    x = -21/2 or - 10 1/2
    5. right
    6. right
    7. right
    8. right
    9. right
    10. right 1/2 = -1/(-2)

  • Algebra -

    Whoa - #1
    I did not finish correctly
    (8 – 3) (12 ÷ 2 • 2) – 20
    (5)(6*2) -20
    (5)(12) - 20
    60 - 20
    40

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