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icang [17]
3 years ago
14

Please help ASAP I have no clue how to do this

Mathematics
1 answer:
MariettaO [177]3 years ago
8 0
These piecewise functions are several graphs pieced together. Where one ends the other begins.

The greater than (> or <) symbol means an open circle at that point. If it is greater than or equal to (>=) then you put a closed solid circle.

start with the first one
-2x + 3 where -4 =< x < -1
put in these values for x
solid circle at (-4, 11)
open circle at (-1, 5)
graph is a straight line so connect the circles

next one
|2x -1| where -1 < x < 2
absolute value graphs are V-SHAPED where y is always positive. solve for vertex (x, 0)
0 = 2x -1
x = 1/2
(1/2, 0) vertex of V
solve for endpoints, both are open circles
(-1, 3)
(2, 3)

next one is easy. it's just a solid point
When y = 5 ; x = 2
(2,5)

last is a parabola, or just half of a parabola, aka bowl shaped graph
3x^2 - 1 when x > 2
plug in x = 2
open circle at (2, 11)
you can put in another x value greater than 2 to find a second point to help draw the graph but it's just a curve upward that continues with an arrow, no endpoint
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Answer:

B) f(x) = 3x² - 2x + 5

Step-by-step explanation:

To find the correct quadratic function that represents the table, you must substitute [x] into the quadratic function.

A) f(x) = 3x² + 2x - 5

B) f(x) = 3x² - 2x + 5

C) f(x) = 2x² + 3x - 5

D) f(x) = 2x² - 2x + 5

A.   3(-2)² + 2(-2) - 5 =

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12 -  4 - 5

12 - 9

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B.   3(-2)² - 2(-2) + 5 =

3(4) + 4 + 5

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C.   2(-2)² + 3(-2) -5 =

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8 - 11

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D.   2(-2)² + 2(-2) + 5 =

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8 - 4 + 5

8 + 1

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Your correct answer is: B

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All most done thanks for hanging in there
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