Answer:31/28
Step-by-step explanation:
The answer is D. because for it to be the Addition Property of Equality you have to use addition to find the answer.
320 = 2x² - 12x as when there are an unknown number of rows there are 320 seats.
0 = 2x² - 12x - 320
0 = x² - 6x - 160
0 = (x - 16)(x + 10)
for this to = 0 one bracket must equal 0
therefore x = 16 or x = -10
not a negative number of rows.
Therefore must be 16.
Answer:2(-5)+3(7)-11=-10+21=11-11=0
Step-by-step explanation:
A quadratic equation could yield one of two types of roots: real and imaginary. Rational roots are whole numbers and fractions, whereas imaginary roots are complex numbers incorporating the 'i' symbol. When you say, the equation has one real root, this means that there are actually two roots but same in value. That would be letter (x-3)(x-3) = 0. Its root is x=3.
