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lidiya [134]
3 years ago
6

Find the solution to the equation below. 2x^2+3x-20=0

Mathematics
2 answers:
icang [17]3 years ago
8 0

C maybe bro I’m not really sure tho think I’m messing up

Sphinxa [80]3 years ago
4 0
<h2>Answer:</h2>

<u>The right choice is </u><u>(D) x= -4, 5/2</u>

<h2>Step-by-step explanation:</h2>

2x^2+3x-20=0

By factoring the expression we get

2x²2  +8x−5x−20=0

(x+4) (2x−5) = 0

Now

(x+4) = 0 OR x = -4

and

(2x-5) = 0 OR x = 5/2

S the solutions are

x= -4 and x = 5/2

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The differences are: 250, -400, -250, 350, 100, -50 

Then you square those values and add up the squares

(250)^2 +  (-400)^2 +  (-250)^2 +  (350)^2 +  (100)^2 +  (-50)^2 = 420,000
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The fuel efficiency in miles per gallon of all bmw 320i's is (approximately) normally distributed with a mean of 25 and a standa
grigory [225]
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If we select n samples for evaluation, we should calculate z-scores that are based on the standard error of the mean.
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z = (24 -25)/2 = -0.5
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Part (ii): n = 4
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