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NemiM [27]
2 years ago
5

Solve the inequality. x+5>9

Mathematics
1 answer:
fomenos2 years ago
8 0

Answer:

X=5

Step-by-step explanation:

When finding a variable, you must do inverse operations, or actions that undo each other. We must subtract 5 from 9. The answer is 4, so we know that the answer is 5, because the answer has to be greater than 9.

5+5=10>9

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If -1 and 2 are the two zeros of the polynomial x3-4x2-7x+10 find the third zero
rewona [7]

note that the zeroes should be x = 1 and x = - 2 not x = - 1 and x = 2

the factors are then ( x - 1 ) and (x + 2)

and x³ - 4x² - 7x + 10 = (x - 1 )(x + 2) = x² + x - 2

thus x² + x - 2 is a factor

dividing x³ - 4x² - 7x + 10 by x² + x - 2 gives x - 5

the third zero is x = 5

check : (5)³ -4(5)² - 7(5) + 10 = 125 - 100 - 35 + 10 = 0




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The quadratic formula is x= -b +/- √b²-4ac / 2a

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