120 because 60 times two is 120 and six times two is twelve
Since there are 6 students with neither brown hair nor blue eyes, the remaining number of students with at least one of the characteristic is 24. The sum of the students with brown hair only, with blue eyes only, and with both should be equal to 24. By letting x be the number of students with both, the equation that would best represent the given is,
(15 - x) + x + (17 - x) = 24
The value of x from the equation is 8.
Answer:
Step-by-step explanation:
Factor x²-9 and x²-5x+6.
Least common multiple of (x+3), (x-3), (x-2), and (x-3) is (x+3), (x-3), and (x-2).
Adjust the fractions based on LCM.
Subtract the fractions since denominators are equal.
Expand.
The fraction can be in factored form.
Answer:
.20
Step-by-step explanation:
The word percent literally means "Out of 100". With that being said, 20% can be written as a fraction, mixed number or whole number as follows: 1/5 (fraction), 20/100 (mixed number) or .20 (whole number).
Divide through by 5
5/5 x^2 + 13/5 x - 6/5 = 0/5
Which gives
X^2 + 13/5 x - 6/5 = 0
Move constant to right
X^2 + 13/5 x = 6/5
Take half of x term and square it
(13/5 * 1/2)^2 = 169/100
Add to both sides
X^2 + 13/5 x+ 169/100 = 6/5 +169/100
(X +13/10)^2 = 289/100
Root both sides
X + 13/10 = +- root(289/100)
Simplify
X + 13/10 = +- 17/10
X= -13/10 +- 17/10
Therefore
X = -13/10 +17/10
Or
X = -13/10 - 17/10
Which becomes
X=0.4 and x=-3
Hope this helps
