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faust18 [17]
3 years ago
8

2. Which relations are functions? Explain. For each graph, state the domain and range.

Mathematics
1 answer:
ale4655 [162]3 years ago
7 0

Answer:

A. and C. neither of them have a repeating y value if you input a vertical line on the graph

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|x + 2| < 4
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If a worker produces 175 parts per hour, how many can be produced in 7 hour?
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Arie makes 3 giant sandwiches to share equally with 8 friends. Each friend gets a fraction of a sandwich. Choose which two whole
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7 0
4 years ago
Solve x^3+3x^2-23x-20=0
adoni [48]

Hello from MrBillDoesMath!

Answer:

x = 4

x  =  ( -7 + sqrt(29)) /2

x =   ( -7 - sqrt(29)) /2

Discussion:

x^3+3x^2-23x-20 factors as (x - 4) (x^2 + 7 x + 5) so x =4 is one root

The roots of the quadratic factor, x^2 + 7x + 5, can be found using the quadratic formula where a = 1, b = 7, and c = 5

x =  (  -b +\- sqrt(b^2-4ac)) / 2a

x = ( -7 +\- sqrt( 7^2 - 4*1*5) ) / (2*1) =>

x =  ( -7 +\- sqrt (49-20) ) /  2 =>


The "+" root:    ( -7 + sqrt(29)) /2

The "-" root:    ( -7 - sqrt(29)) /2




Regards,  

MrB


5 0
3 years ago
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