Summary ALGEBRA

Algebra Quiz:


1. Expression: 2x + 5
Solution: If x = 3, then 2x + 5 = 2(3) + 5 = 6 + 5 = 11.
2. Expression: 3y - 7
Solution: If y = 4, then 3y - 7 = 3(4) - 7 = 12 - 7 = 5.
3. Expression: 4a + 2b
Solution: If a = 2 and b = 3, then 4a + 2b = 4(2) + 2(3) = 8 + 6 = 14.
4. Expression: 5x^2 - 3x + 1
Solution: If x = 1, then 5x^2 - 3x + 1 = 5(1)^2 - 3(1) + 1 = 5 - 3 + 1 = 3.
5. Expression: 2m^3 + 6m^2 - m
Solution: If m = -2, then 2m^3 + 6m^2 - m = 2(-2)^3 + 6(-2)^2 - (-2) = 2(-8) + 6(4) + 2 =
-16 + 24 + 2 = 10.


6. Expression: 3x - 2
Solution: If x = 4, then 3x - 2 = 3(4) - 2 = 12 - 2 = 10.
7. Expression: 2y + 7
Solution: If y = -3, then 2y + 7 = 2(-3) + 7 = -6 + 7 = 1.
8. Expression: 5a - 3b
Solution: If a = 5 and b = 2, then 5a - 3b = 5(5) - 3(2) = 25 - 6 = 19.
9. Expression: 4x^2 + 2x - 3
Solution: If x = -1, then 4x^2 + 2x - 3 = 4(-1)^2 + 2(-1) - 3 = 4 - 2 - 3 = -1.
10. Expression: 3m^3 - 2m^2 + 5m
Solution: If m = 3, then 3m^3 - 2m^2 + 5m = 3(3)^3 - 2(3)^2 + 5(3) = 3(27) - 2(9) + 15 =
81 - 18 + 15 = 78.