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January 25, 2015

January 25, 2015

Posted by **Loreal** on Sunday, December 23, 2007 at 1:48pm.

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 -
**Damon**, Sunday, December 23, 2007 at 2:58pm1. 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 -
**Damon**, Monday, December 24, 2007 at 3:40pmWhoa - #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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