exam Maths Puzzle Numerical Ability

Theta = x
If x is an acute angle with cos x = 1/9, find the exact value of sin a/2.

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exam Other Question

two cars left an intersection at the same time. one traveled north. the other traveled 14 miles farther in the same amount of time, but to the east. how far apart were they at that express each inequality a) using the number line b) in interval notation and c) as a solution set

_2x-8__ > 2
4

problem reads 2x-8 over 4 > than 2