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prince96
26.01.2020 •
Mathematics
Ray cupple bought a basic car costing $26,500.00, with options costing $725.00. there is a 6% sales tax in his state and a combined $50.00 licenses and registration fee. what was ray's total cost?
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Ответ:
Part B: x = -5/2, and x = 1/2,
Part C: f(x)→ + ∞, as x→ − ∞, f(x)→ + ∞, as x→ + ∞ ,
Part D: I would start with determining the vertex. Knowing it's properties ( f(x)→ + ∞, as x→ − ∞ etc. ) we would determine the type of graph, and provided it's x - intercepts we can plot two points on either side and connect them to this vertex and extend beyond infinitely
Step-by-step explanation:
Part B: It would be easier to factor the expression 4x^2 + 8x - 5, firstly;
( 4x^2 - 2x ) + ( 10x - 5 ),
2x ( 2x - 1 ) + 5 ( 2x - 1 ),
Factored Expression: ( 2x + 5 )( 2x - 1 ) ⇒ f ( x ) = ( 2x + 5 )( 2x - 1 )
Now this equation isn't in standard form, but to determine the x - intercept the y - value must still be 0;
0 = ( 2x + 5 )( 2x - 1 ),
2x + 5 = 0, and 2x - 1 = 0,
x = -5/2, and x = 1/2
Part C: Knowing that this graph extends upwards ( an upward facing parabola ), the end behavior would be such;
f(x)→ + ∞, as x→ − ∞, ⇒ demonstrated by the above
f(x)→ + ∞, as x→ + ∞
Part D: I would start with determining the vertex. Knowing it's properties ( f(x)→ + ∞, as x→ − ∞ etc. ) we would determine the type of graph, and provided it's x - intercepts we can plot two points on either side and connect them to this vertex and extend beyond infinitely