Math test questions are in the picture.

Step-by-step explanation:

question 4: a. x≤125

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when you multiply or divide both sides by negative number, You need to change sign. in this case she should have written: x>-5

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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