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Alchen [17]
3 years ago
15

If one zero of the quadratic polynomial x²+3x+k is 2, then the value of k is. [ ]

Mathematics
2 answers:
Alex_Xolod [135]3 years ago
3 0

Answer:

b) -10

Step-by-step explanation:

x^2 + 3x + k = (x - 2)(x - a)

(x - 2)(x - a) = x^2 - 2x - ax + 2a = x^2 + [-2 - a)x] + 2a

-2 - a = 3

2a = k

a = -5

k = 2(-5) = -10

Answer: b) -10

yulyashka [42]3 years ago
3 0

Answer:

GET READY FOR FIGHT !!!!!

Step-by-step explanation:

*Intense music in background*

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Solve using elimination
Margarita [4]
Well, it was good that you did subtract A from B to get
0=x^2-152x
then factor out the x (what do you mean it cannot be factored?)
0=x(x-152)
x=0 or 0=x-152 so x=152

so on day 0 and day 152

3 0
3 years ago
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allochka39001 [22]
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So, from the above figures we can see that the Median for the Class Data is around 82 and the median for the Exam Data is around 87. It is clear that the Median of Exam data is higher than the Median of Class Data.

So, the best statement to describe the medians will be the option C. The class median is lower than the exam median. The option A and B are not correct. The outlier does have not have much of a large impact on the median of the data and neither the spread of the data primarily determines its median. Median only depends on the number of values in the data set.

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6 0
3 years ago
Read 2 more answers
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Basile [38]
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3 0
3 years ago
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When you need a fraction of a number like 1/3 of 9 how do you find out how much you need?
Natalija [7]

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In some cases however, you can convert the whole number into a fraction and then divide it to get the amount in fractional units that you require.

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5 0
4 years ago
Help me anyone that great in math
pochemuha

Answer:

B) 24/35

Step-by-step explanation:

Cos(X)= Adjacent/Hypotenuse

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Therefore, option B is your answer.

Hope this answers your question!!

6 0
3 years ago
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