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

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)

Whoa - #1

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

1. To evaluate the expression (8 – 3) (12 ÷ 2 • 2) – 20, we need to follow the order of operations (also known as PEMDAS/BODMAS).

First, let's simplify the multiplication and division within the parentheses:
(8 – 3) = 5
(12 ÷ 2 • 2) = (12 ÷ 2) x 2 = 6 x 2 = 12

Now, the expression becomes:
5 x 12 - 20

Next, perform the multiplication:
5 x 12 = 60

Finally, subtract 20 from the result:
60 - 20 = 40

Therefore, the answer to the expression (8 – 3) (12 ÷ 2 • 2) – 20 is 40.

2. To solve the equation 6x – 7 = 5(x – 2) for x, we need to distribute the 5 on the right side of the equation.

6x – 7 = 5x – 10

Next, combine like terms by subtracting 5x from both sides:
6x – 5x – 7 = -10

Simplifying further:
x – 7 = -10

To isolate x, add 7 to both sides of the equation:
x – 7 + 7 = -10 + 7

This simplifies to:
x = -3

Therefore, the value of x is -3.

3. To solve the equation 3x – 2y = 12 for y, we need to isolate y on one side of the equation.

First, subtract 3x from both sides:
3x – 3x – 2y = 12 – 3x

Simplifying further:
-2y = 12 – 3x

To isolate y, divide both sides by -2:
-2y / -2 = (12 – 3x) / -2

This simplifies to:
y = -6 + 1.5x

Therefore, the equation as a function of x is f(x) = -6 + 1.5x.

4. To solve the equation –3(x – 3) + 8(x – 3) = x – 9, we need to simplify the left side of the equation and then solve for x.

First, distribute the -3 and 8 through the parentheses:
-3x + 9 + 8x - 24 = x - 9

Combine like terms by adding or subtracting:
(8x - 3x) + (9 - 24) = x - 9

Simplifying further:
5x - 15 = x - 9

Next, subtract x from both sides:
5x - x - 15 = x - x - 9

Simplifying further:
4x - 15 = -9

Add 15 to both sides:
4x - 15 + 15 = -9 + 15

This simplifies to:
4x = 6

Finally, divide both sides by 4 to solve for x:
4x / 4 = 6 / 4

This gives us:
x = 1.5

Therefore, the solution for x in the equation –3(x – 3) + 8(x – 3) = x – 9 is x = 1.5.

(Continued in next message)