a high school marching band has 24% seniors 22% Juniors 28% sophomores and 26% freshmen. what is the probability of a randomly-c
hosen student being either a sophomore or a junior?
2 answers:
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Answer:
Step-by-step explanation:
let angle . be
then,
using angle sum property,
x+y+90=180 (angle c is 90 because its given)
hence you have the equation
Answer:
The minimum y-value is
or
Step-by-step explanation:
we have
This is the equation of a vertical parabola open up
The vertex is the minimum y-value on the graph
Convert the equation into vertex form
Group terms that contain the same variable, and move the constant to the opposite side of the equation
Factor the leading coefficient
Complete the square. Remember to balance the equation by adding the same constants to each side
Rewrite as perfect squares
------> equation in vertex form
The vertex is the point (-0.5,-7.75)
therefore
The minimum is the point (-0.5,-7.75)
The minimum y-value is
see the attached figure to better understand the problem
