Select the correct answer. The graph shows the calling charges of two cell phone companles. At how many minutes do the two compa
nies charge the same amount?
a.0
b.15
c.20
d.40
a.0
b.15
c.20
d.40
2 answers:
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Answer:
Step-by-step explanation:
1. f(x)= x^2+10x+25
a) (-5,0)
c)x=-5
2. image attached
a) when finding the zeros or roots of the quadratic
3. the discriminant of a polynomial is a quantity that depends on the coefficients and determines various properties of the roots.
a) b^2-4ac
Answer:
C.
Step-by-step explanation:
We use the Quadractic Formula:
*Excuse the bad ± (plus or minus) sign. It wouldn't let me put it in the equation maker
<em>a</em> = 1
<em>b</em> = -5
<em>c</em> = 7
Step 1: Plug in our variables
Step 2: Solve
√-3 is equal to √-1 times √3, and √-1 is equal to imaginary i
Thus, we have:
(5 ± i√3)/2 or (5 + i√3)/2 and (5 - i√3)/2