Answer:
(u+3)(u-3)
Step-by-step explanation:
u²-9 = u²-3²
a²-b²=(a+b)(a-b)
u²-3²=(u+3)(u-3)
Answer:
never ever not in a million years
Step-by-step explanation:
Answer:
1/4
Step-by-step explanation:
8 blue chips 9 pink chips 1 white chip = 18 chips
P( pink) = pink/total = 9/18 = 1/2
Replace
8 blue chips 9 pink chips 1 white chip = 18 chips
P( pink) = pink/total = 9/18 = 1/2
P(pink, replace, pink) = 1/2 * 1/2 = 1/4
The factors are
(x-y)(x-y)
or
(x-y)^2
Explanation:
We need to factor the trinomial
x^2-2xy+y^2
The factors of x^2 = (x)(x)
The factors of y^2 = (y)(y)
Since the second sign is positive we are adding the factors meaning the signs of the factors need to be the same. Since the first sign is negative both signs must be negative.
The factors are
(x-y)(x-y)
or
(x-y)^2
Check by FOIL
Firsts (x)(x) = x^2
Outers (x)(-y) = -xy
Inners (-y)(x) = -xy
Lasts (-y)(-y) = y^2
combine the middle terms
(-xy)+(-xy) = -2xy
<span>x^2-2xy+y^2</span>
Dana can type 90 words per minute.
Since, 1 minute =
hours
Therefore, number of words she can type = 
= 90×60
= 5400 words per hour
If she types
words in 'x' hours.
Number of words Dana types with the given speed in 'x' hours = Speed of typing × Time
= 
Therefore, 


hours
Therefore, Dana types
words in 48.15 hours.
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