Ihate this part i need for 4 and 5 is it a b c or d

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Merrida uses a pattern in the multiplication table below to find ratios that are equivalent to 7: 9. if merrida multiplies the first term, 7, by a factor of 6, what should she do to find the other term for the equivalent ratio? multiply 9 by 1. multiply 9 by 6. multiply 9 by 7. multiply 9 by 9.

Why is partitioning a directed line segment into a ratio of 1: 3 not the same as finding the length of the directed line segment?