Question

in the number 7 + 3i, what type of number is 3i? (1 point)
rational
real
irrational
imaginary

Explanation:

In a complex number of the form $a + bi$, $bi$ is the imaginary part. Here, in $7 + 3i$, $3i$ is of the form $bi$ where $b = 3$ and $i=\sqrt{- 1}$. Rational numbers are of the form $\frac{p}{q}$ ($q
eq0$), real numbers have no $i$ component, and irrational numbers are non - repeating non - terminating real numbers. Since $3i$ has the $i$ (square root of negative one) component, it is an imaginary number.

Answer:

imaginary