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Effectus [21]
3 years ago
11

Solve x^2-2x-3=0 by graphing A. X=-1,3 B. X=-1,3 C. No solution D. X=-1,3

Mathematics
2 answers:
ioda3 years ago
7 0
The answer is 3, -1.
atroni [7]3 years ago
7 0

Answer: x= -1, 3

Step-by-step explanation:

x^2 -2x -3=0

It is asking what is x when y is 0, so find the x-intercepts

to solve by graphing: type equation into desmos or a graphing calculator(<em>Y=, GRAPH</em>)

the points of intersection with the x axis are (-1,0) and (3,0)

so x=-1, 3

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Students were surveyed about their favorite colors 1/4 preferred red, 1/8 preferred blue, 3/5 preferred green. If 15 students pr
const2013 [10]

Answer:

Let us assume the total number of students surveyed = x

Then

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Number of students preferring blue = x/8

Then

Number of students remaining = x - [(x/4) + (x/8)]

                                                  =x - [(2x + x)/8)

                                                  = x - (3x/8)

                                                  = (8x - 3x)/8

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We also know that the total number of students preferring the color green is 15

So

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Step-by-step explanation:

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