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saveliy_v [14]
3 years ago
15

What is the solution set of 7 x2 + 3 x = 0? {0, 3/7} {0, -3/7} {0, -4/7}

Mathematics
1 answer:
kari74 [83]3 years ago
4 0

Answer:

{ \tt{7 {x}^{2} + 3x = 0 }} \\ { \tt{x(7x + 3) = 0}}

Either x = 0 or ( 7x + 3 ) = 0 :

{ \tt{7x + 3 = 0}} \\ { \tt{x =  -  \frac{3}{7} }}

Answer:

{ \bf{(0, \:  -  \frac{3}{7}) }}

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The total interest cost to Bette is  $145.89

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The amount would have been different if ordinary interest where the number of days in a year is deemed to be 360, was used instead

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