Answer:

Step-by-step explanation:
we know that
The formula to calculate the midpoint between two complex numbers (a+bi) and (c+di) points is equal to

we have
(1+9i) and (5-3i)
substitute the given values


5.
the diagonal squared = base squared + altitude squared.
Answer:
$38.40
Step-by-step explanation:
to get your total you multiply
48 x 20% =9.60
then you subtract 48.00 - 9.60 = $38.40