exam Maths Puzzle Numerical Ability

I need help with solving w=Cr with the square root of -2
1 mile=5,280
In particular, the weight of an object follows this equation : w=Cr^-2, where C is a constant, and r is the

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exam Other Question

Solve the system by using the substitution method. Determine whether the equations are Independent, Dependent, or Inconsistent:

1/2x + 1/3y = -1/3
1/2x + 2y = -7 Sin(-x)/sin(∏+x) - tan(∏/2 + x)/cot x + cos x/sin(∏/2 + x) = 3

Please solve above trig. identi