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
1) quarter- pound can be written as 1/4 pound
100:1/4=100*4=400
400 <span> hamburgers
2) The difference between these temperatures 212-32=180
180
Any number that is more than 32 and less than 212 is between this temperatures.
For example 40, and 136 lie between 32 and 212.
3) 1000, 100, 10, 1...
We can see that every next number 10 times less than previous number,
so after 1 should be 1/10=0.1
If it is written as fraction 1/10, if it is written as decimal 0.1.</span>
The answer is 1 because 7*9 is 63
7*10=70 70-7=63
C = 2πr
C = 2(3.14)(0.8)
C = 2(2.512)
C = 5.024 m
The answer is C.
