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dalvyx [7]
2 years ago
6

Which statement is true?

Mathematics
1 answer:
Mila [183]2 years ago
5 0

Answer:

The equation -x2 + 6x - 9 = 0 has two real solutions.

Step-by-step explanation:

{b}^{2}  - 4ac = {6}^{2}  - 4( - 1)( - 9) = 0

The discriminant equals to 0, so the quadratic equation has 1 real solution.

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The sampling distribution of the ratio of two independent sample variances selected randomly from normal populations with equal
Likurg_2 [28]

Answer:  F distribution. chi-square distribution. t distribution. normal distribution.

Step-by-step explanation:

5 0
2 years ago
What is 278 minus 149
Basile [38]

Answer:

129

Step-by-step explanation:

278 - 149 = 129

5 0
2 years ago
Read 2 more answers
Need help with math probelm if do 5 stars
slamgirl [31]

Answer:

b) -9.25

Step-by-step explanation:

-1/4 = -0.25

-9 + -0.25 = -9.25

-10, -9.75, -9.5, -9.25, -9, -8.75, -8.5, -8.25, -8, -7.75, -7.5, -7.25, -7

Hope this helps!

4 0
2 years ago
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What is the derivative of cosx
grandymaker [24]
-sinx + C
hope this helps!
7 0
3 years ago
roger completed a probability experiment with a coin. he flipped the coin 32 times, and it landed on tails eight times. he looke
vladimir2022 [97]
I don't know what this question is asking exactly, but if i am right, it is asking for the ratio of heads flipped to tails flipped. If this is correct, then the ratio would be 24 to 8. My reasoning for this is, it already tells you that you have 8 times that tails was flipped, and all you have to do to figure out the amount of times heads if flipped it to subtract: 32-8=24, so that means that heads was flipped a total of 24 times. The last thing that you have to do is to put it into a ratio, and in the order it gives you initially, which would make the answer (3 ways):

1)   24 to 8
2)   24 : 8
3)   24/8

I hope this helps you.
4 0
3 years ago
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