Answer:
The second one because $2.50
Step-by-step explanation:10.5/3 1/3=3.15 6.25/2.5=2.50
The boats going at a speed of about 17
So in 13 hours it would have gone 221miles
Answer:
72
Step-by-step explanation:
1. Proportion:
8/15=x/135
2. Answer is 72
Consider the two functions as
<span>y1(x) =3x^2 - 5x,
y2(x) = 2x^2 - x - c
The higher the value of c, father apart the two equations will be.
They will touch when the difference, i.e. y1(x)-y2(x)=x^2-4*x+c has a discriminant of 0.
This happens when D=((-4)^2-4c)=0, or when c=4.
(a)
So when c=4, the two equations will barely touch, giving a single solution, or coincident roots.
(b)
when c is greater than 4, the two curves are farther apart, thus there will be no (real) solution.
(c)
when c<4, then the two curves will cross at more than one location, giving two distinct solutions.
It will be more obvious if you plot the two curves in a graphics calculator using c=3,4, and 5.
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ANSWER

EXPLANATION
The vertex of the graph is at

The equation of the graph in vertex form is given by the formula,

The above graph has a minimum point, hence

When we put these values into the equation we obtain,

This implies that,

The point (-2,0) lies on the line.



The correct answer is D.