Reviewing the Grade 8 course
Answers are for parents and teachers.
1
The graph of y = kx + b passes through (0, −1) and (3, 5). Find k and b.
k = 2, b = −1
2
Solve x² + 3x − 10 = 0.
x₁ = 2, x₂ = −5
3
Solve the system 2x + y = 8, x − y = 1.
(3, 2)
4
Solve |2x − 1| ≤ 5.
−2 ≤ x ≤ 3
5
Solve the biquadratic equation x⁴ − 10x² + 9 = 0.
x = ±1, x = ±3