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creativ13 [48]
3 years ago
11

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Mathematics
2 answers:
alisha [4.7K]3 years ago
5 0

\Delta=5^2-4\cdot1\cdot7=25-28=-3

\Delta so 0 solutions.

DaniilM [7]3 years ago
4 0

Answer:

No Real roots to this Quadratic Equation

Step-by-step explanation:

Our Quadratic equation is given as

x^2+5x+7=0

In order to find that do we have the real roots of a quadratic equation , the Discriminant must be greater or equal to 0. The Discriminant is denoted by D and given by the formula

D= b^2-4ac

Where b is the coefficient of the middle term containing x, a is the coefficient of the term containing x^{2} and the c is the constant term.

Hence we have

a = 1 , b = 5 and c = 7

Calculate D

D=b^2-4ac\\D=5^2-4*1*7\\D=25-28\\D=-3

Hence we see that the Discriminant (D) is less than 0, our answer is no real roots to this quadratic equation.

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Step-by-step explanation:

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Remember that

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we know that the radicand of the function must be greater than or equal to zero

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x\geq 7

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8 0
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deff fn [24]

Since the sum of the probabilities of all possible outcomes must be 100%, we can deduce the following:

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In fact, the probabilities of cooking in less than 20 or more than 30 sum up to 15%, which means that the remaining outcome (i.e. cooking time between 20 and 30) must complete this probability to 15, and in fact 15+85=100.

That being said, all three answers are simply a combination of these three scenarios: let C be the cooking time, for aesthetic reasons:

P(C\geq 20) = P(20 \leq C \leq 30)+P(C\geq30) = 85\%+5\%=90\%

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3 years ago
luis spent 8.75 on snacks at a basketball game. candy costs 1.25$ per package and chips cost .50$. Luis bought 10 snacks how man
ale4655 [162]

Answer:

Luis bought 5 packages of candy and 5 bags of chips

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1.25 for candy

0.50 for chips

1.25c + 0.50c = 8.75

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