7
3x4
+
Test 3 MAT 190 Summer 2008 Name ________________________
Simplify all answers and show your work!
1. Solve the inequality: 5(2x – 6) < 3(x + 4) – 2 2. Solve the inequality: 7x428
<
−
≤
−
3. If 30 pounds of tomatoes and 10 pounds of bananas cost $23 and 20 pounds of tomatoes and 40
pounds of bananas cost $32, what is the price per pound each of tomatoes and bananas?
4. If f(x) = , find the inverse (f -1(x)). 5. Combine like terms:
14xy + 5x2y3 – 3x2y + 7xy – 6x2y
6. Add: (3x3 – 2x2 + 5x) + (4x3 + 13x2 – 8x)
Simplify the following:
7. 26
34
yx12
yx8
−
−
8. 32 • 23 • 3 – 4 • 2 – 2 9.
3
32
25
yx
yx2
10. 4
5
16
−
11. 298 )yx3( −− 12. Subtract: (8x2 – 5x + 3) – (6x2 + 2x – 7)
