exam Maths Puzzle Numerical Ability

log base 2 (x+5) + log base 2 (x+2) = log base 2

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exam Other Question

Given x + iy form, write in polar form: 12 + 5i How to figure row of operations on augmented matrix to determine whether the system is independent, dependent, or inconsistent.

x+y+z=11
x-y=3z=15
2x=2y+2z=15