Grade 9 Algebra review
Answers are for parents and teachers.
1
Find the vertex of the parabola y = −x² + 6x − 5.
(3, 4)
2
Solve the inequality x² − 4x > 0.
(−∞, 0) ∪ (4, +∞)
3
Find 1 + 2 + 3 + ... + 20.
210
4
In a geometric progression b₂ = 6, b₄ = 54 and q > 0. Find q and b₁.
q = 3, b₁ = 2
5
Cards are numbered 1 to 30. What is the probability of drawing a multiple of 6?
1/6