Answer:
x = - 4 ± 2
Step-by-step explanation:
Given
f(x) = x² + 8x + 4
To find the zeros, let f(x) = 0, that is
x² + 8x + 4 = 0 ( subtract 4 from both sides )
x² + 8x = - 4
Using the method of completing the square
add (half the coefficient of the x- term )² to both sides
x² + 2(4)x + 16 = - 4 + 16
(x + 4)² = 12 ( take the square root of both sides )
x + 4 = ± 
= ± 2 ( subtract 4 from both sides )
x = - 4 ± 2
Answer:
135 gallons
Step-by-step explanation:
gallons of a 50% + 90 gallons of 25% = mixture that is 40%
50x + 25(90) = 40(x + 90)
50x + 2250 = 40x + 3600
10x = 1350
x = 135
Answer:
Amy: 0.78 Gallons
Dan : 0.14 Gallons
Mike: 0.5 Gallons
Answer: Amy
Step-by-step explanation:
Look closely
It would be 12 (B)
thats i beleive the answer
X = 18
Solve for x by simplifying both sides of the equation, then isolating the variable.
