book Maths Puzzle Numerical Ability

GRAPH THE FOLLOWING INEQUALITY 4X + Y> 4
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book Other Question

what is the exact value of sin 22.5 degrees using the sum, difference, half, or double angle formulas and the exact value chart in the solution. Please help me rationalize the expression 2sqrt3+sqrt2/sqrt3-sqrt2 so there are no radicals in the denominator. I came up with 4-sqrt6
Thanks a lot