Answer:
see below
Step-by-step explanation:
(2x + i)(2x – i)
FOIL
first 2x*2x =4x^2
outer -i * 2x = 2x i
inner i * 2x = 2x i
last i * -i = -i^2 and i^2 = -1 so - (i^2 ) = - (-1) = 1
Add together
4x^2 + 2xi -2x i +1
Combine like terms
4x^2 +1
Answer:
75%
Step-by-step explanation:
Answer:
A ). 12
Step-by-step explanation:
9514 1404 393
Answer:
8%
Step-by-step explanation:
The fraction donated was $632/$7900.
As a percentage, that is ...
632/7900 × 100% = 0.08 × 100% = 8%
The store donated 8% of sales to charity.
Answer:
r = 2
Step-by-step explanation:
2(8r + 5) = 24 + 9r
16r + 10 = 24 + 9r
16r - 9r = 24 - 10
7r = 14
r = 2
