Review of the Grade 8 course
Answers are for parents and teachers.
1
Simplify (2x + 2)/(x² - 1).
2/(x - 1)
2
Compute (x + 1)/x - (x - 1)/x and find its value at x = 4.
1/2
3
Solve 3x² - 5x - 2 = 0.
x₁ = 2, x₂ = -1/3
4
Solve the system {2x + 1 ≥ -3, 4 - x > 1}.
-2 ≤ x < 3
5
Find the mean, mode and median of the sample 2, 3, 3, 5, 7.
mean 4, mode 3, median 3