If the discriminant is positive,that means that there are roots that are real and therefore, when y=0, the roots are there and for the quadratic to meet it has to go down (or up if in ax²+bx+c a is negative). If the discriminant is 0, that means that since the x value of the vertex is -b/2a and if you have
x=

and b^2-4ac=0, we're left with 0 and we are therefore left with -b/2a as the vertex and the vertex being the x intercept. If the discriminant is negative, that means that there is no y intercept and the vertex therefore has to be over y=0
Answer:
5
Step-by-step explanation:
40÷[20-4*(7-4)]
Start with the inner most parentheses
40÷[20-4*(3)]
Then the brackets, multiply first
40÷[20-12]
Then subtract
40÷[8]
We are now left with the division
5
Answer:
the answer is 1/4
Step-by-step explanation:
of the movies at the video rental store are animated children's movies.
Step-by-step explanation:
Given,
Fraction of children's movies at the rental store = 
Fraction of animated movies =
of children's movies
Fraction of animated movies = 
Fraction of animated movies = 
of the movies at the video rental store are animated children's movies.
Keywords: fraction, multiplication
Learn more about fractions at:
#LearnwithBrainly
Answer:
Refer to the picture attached for step by step answer..
hope it helps