X = total amount of people
80% of x = 540
.8x = 540
x = 675
There were 675 people
200=x-4 original equation
204=x addition property of equality (add 4 on both sides)
x=204 symmetric property
Y = 18 x² + m x + 2
Exactly one x - intercept is for:
D = m² - 4 · 18 · 2 = 0
m² - 144 = 0
m² = 144
Answer:
m = -12 or m = 12
