Answer:
<h2>(2 + 2i)(5 + 3i) = 4 + 16i</h2>
Step-by-step explanation:
Use FOIL: <em>(a + b)(c + d) = ac + ad + bc + bd</em>
and i² = -1
(2 + 2i)(5 + 3i) = (2)(5) + (2)(3i) + (2i)(5) + (2i)(3i)
= 10 + 6i + 10i + 6i² = 10 + 6i + 10i + 6(-1)
= 10 + 6i + 10i - 6 <em>combine like terms</em>
= (10 - 6) + (6i + 10i)
= 4 + 16i
<span>The exponent of a number says how many times to use the number in a multiplication.</span><span>In 82 the "2" says to use 8 twice in a multiplication,
so 82 = 8 × 8 = 64
</span><span>In words: 82 could be called "8 to the power 2" or "8 to the second power", or simply "8 squared"</span>
Answer:
I think its 56.1248608016
Step-by-step explanation:
Use desmos.com
If x is the price before a sale
x-0.15x=x-3
0.85x=x-3
3=0.15x
x=20
The original price is $20
Answer:
B. x = 86, y = 75, z = 94
Step-by-step explanation:
As always, the sum of angles of a triangle is 180°. When two angles of a triangle are given, they can be subtracted from 180° to find the missing value.
x = 180 -35 -59 = 86
y = 180 -(35+11) -59 = 75
z = 180 -11 -75 = 94
_____
As a check, we must also have x+z=180.