Atour director collected $258 for 13 tour package tour package a cost $18 and tour package b cost $22 how many of each tour package were sold

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

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is their an equation anywhere i can take a   look at it and see if i am right.