Answer:
-69 +92 i (here 'i' is imaginary value)
Step-by-step explanation:
step:-
Given (3-4 i)(-2-21)
on multiplication, we get
(3-4 i)(-2-21) = 3(-2) -3(21) - 4 i (-2) +4 i(21)
= -6 -63 + 8 i +84 i
= -69 +92 i
-69 + 92 i is a complex number.
real part x = -69
imaginary part y = 92
Answer:

Step-by-step explanation:
From the graph in the attachment Y has coordinates:Y(3,2)
The transformation rule for a dilation with a scale factor k about the origin is:

In this case we have 
We substitute the coordinates and
to get:

This simplifies to:

The first choice is correct.
Answer: of what?
Step-by-step explanation:
<span>42 in is 3/4th of 56 in. </span>
<span>3/4th of 24 in. is 18 in. </span>
<span>The length of his friend's shadow at the same time is </span>
<span>b.) 18 in.</span>