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Katena32 [7]
3 years ago
7

Which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring? −b, b2 − 4ac, 2a Use th

e part of the quadratic formula that you chose above and find its value given the following quadratic equation: 2x2 + 7x + 3 = 1
Mathematics
1 answer:
Korolek [52]3 years ago
3 0
It would be: b³ and 4ac. The equation containing these terms is the discriminant. The equation is b²-4ac. a, b and c are the first, second and third are the coefficients of the first, second and third terms of the quadratic equation, respectively.

Let's arrange the equation to the standard one first

2x² + 7x + 3 - 1 = 0
2x² + 7x + 2 = 0

b² - 4ac = (7)² - 4(2)(2) = 33

If the answer is a perfect square, then it can be factored. If not, like in this case, it can't be factored.
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Answer:

option A

Step-by-step explanation:

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I mean:

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3 years ago
What is the place value of the 8 in 281,480,100 ?
barxatty [35]
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3 years ago
In an experiment, some diseased mice were randomly divided into two groups. One group was given an experimental drug, and one wa
damaskus [11]

Answer:

D)Yes, because the difference in the means in the actual experiment was more than two standard deviations from 0.

Step-by-step explanation:

We will test the hypothesis on the difference between means.

We have a sample 1 with mean M1=18.2 (drug group) and a sample 2 with mean M2=15.9 (no-drug group).

Then, the difference between means is:

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If the standard deviation of the differences of the sample means of the two groups was 1.1 days, the t-statistic can be calculated as:

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The critical value for a two tailed test with confidence of 95% (level of significance of 0.05) is t=z=1.96, assuming a large sample.

This is approximately 2 standards deviation (z=2).

The test statistict=2.09 is bigger than the critical value and lies in the rejection region, so the effect is significant. The null hypothesis would be rejected: the difference between means is significant.

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3 years ago
What is the coefficient for x in the equation below?
Oliga [24]
The answer a
Because that’s what I said
5 0
3 years ago
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