Tutors Answer Your Questions about Exponents-negative-and-fractional (FREE)
Question 198266: can you please help me determine how many x-intercepts the parabola has and wether its vertex lies above or below or on the x-axis ((( y=x^2-5x+6 )))
------(1)
x intercept ==> y=0. So put y=0 in (1)
==> 
==> 
==> x={2,3}
So the parabola have two x intercepts.
Since the sign of x^2 is positive, the parabola has a minimum at its vertex.
Vertex is [-b/2a,f(-b/2a)]= (5/2,-1/4) So the vertex lies below the x axis.
Click here to see answer by mathsteacher(28) |
Question 199318: i need help for me to pass my course i need to find the answers to these
remove brackets and collect like terms for the following expressions
A) 5(2a-b)
B) (3x+2)-(4x-Y)
C) 3x(x+3)+x squared
D) (x+y)(x-2y)
Click here to see answer by stanbon(75887) |
Question 200924: The following function computes the cost, C (in millions of dollars), of implementing a city recycling project when x percent of the citizens participate. C(X)=1.4x/100-x
a)Using the model, find the cost if 60% of the citizens participate.
b)Using the model, determine the percentage of participation that can be expected if $4 million is spent on this recycling project. Set up an equation and solve algebraically. Round to the nearest whole percent.
Click here to see answer by josmiceli(19441)  |
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