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
160/4=40
200/5=40
240/6=40
280/7=40
The rate of change is 40, it means that for each person the cost of the ski rental package is $40
I'll walk you through the steps,
first you find the discount--- 4.3 * .4 = 1.72
Subtract discount from original price---4.30 - 1.72 = 2.58
2.58 is now the sale price after the discount.
Now to add tax we must multiply---00.6 * 2.58 = .1548
Add sales to tax price---2.58 + 0.15 = 2.73
So the sale price including tax and the discount will be $2.78
Hope this isn't too confusing and hope it helps<span />
3(x + 1) + 6 = 33
3(x + 1) = 33 - 6 = 27
x + 1 = 27/3 = 9
x = 9 - 1 = 8
x = 8