2b 2a
----------------- + -----------------
(b+a)^2 (b^2 - a^2)
2b 2a
= ----------------- + -------------------
(b+a)(b+a) (b+a)(b-a)
2b(b - a) + 2a(b + a)
= ------------------------------------
(b+a)(b+a)(b-a)
2b^2 - 2ab + 2ab + 2a^2
= ---------------------------------------
(b+a)(b+a)(b-a)
2b^2 + 2a^2
= ------------------------
(b+a)(b+a)(b-a)
2(b^2 + a^2)
= ------------------------
(b+a)^2 (b-a)
Answer:
Numerator: 2(b^2 + a^2)
Denominator: (b+a)^2 (b-a)
Answer:
Hence the best estimate is population with correct option is 74% and
the value for x=148
Step-by-step explanation:
Given:
A sample of 200
Of which 148 prefer brand new coffee
To Find:
Which statement is true?
Solution:
n=200
x=148
remaining 52 prefer old ones .
So estimate population proportion,
p=x/n
p=148/200
p=0.74
p=74 %
Now, when x=52
p=x/n,
p=52/200
p=0.26
p=26%
There is no option for 52 and 24 %
Hence x=148 and p=74%.
Alternatively, you can write radicals as rational exponents, so that you get
Then recalling that
, you have
Answer:
$13.44
Step-by-step explanation:
Answer:
Step-by-step explanation:
Working from the inside out, we take it one bracket at a time
2x-{3x-[<u>x-(2x-1</u>)]}
let's tackle the underlined prolem first
x-(2x-1)
= x-2x+1
= -x+1..we can also write this as 1-x if need be
So we now have (2x-(<u>3x-(-x-1)))</u>
Again, we tackle the undelined problem first
3x-(-x-1)
= 3x+x+1
= 4x+1
So we now have 2x-(4x+1)
Now we can tackle this together
= 2x-4x-1
= -2x-1
