10 yellow cards over 30 = 10/30
second selection : 9 yellow cards over 29 = 9/29
10/30 * 9/29 = 1/3 * 9 /29 = 3/29 = 0.1034 = 10.34%
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It has three lines of symmetry.
Answer:
Option C
Step-by-step explanation:
-x/6 ≤ 3
6(-x/6) ≤ 3 × 6
-x ≤ 18
-1(-x) ≤ -1(18)
x ≥ -18
So the line starts from -18 and extends infinitely to the right.
Answer:
x = √(10) - 2, -√(10) - 2
Step-by-step explanation:
x² + 4x + 4 = 10
factor:
(x + 2)² = 10
take square root of both sides:
x + 2 = ±√(10)
split into 2 equations:
x + 2 = √(10) x + 2 = -√(10)
solve both equations and collect solutions:
x = √(10) - 2, -√(10) - 2
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