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Nitella [24]
3 years ago
14

Need help due 3 minutes!!!!!

Mathematics
2 answers:
Kazeer [188]3 years ago
8 0

x = 2

brainliest please lol

dimulka [17.4K]3 years ago
5 0

Answer:

in standered form -

3x²+4x−14=0

Step-by-step explanation:

Hope this helps :)

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When testing for differences between treatment means, a confidence interval is computed with __________________?
KIM [24]
The confidence interval is based on mean square error. T<span>he </span>mean squared error<span> (</span>MSE<span>) </span><span>of an </span>estimator<span> measures the </span>average<span> of the squares of the </span>errors<span> or </span>deviations.<span> MSE is calculated by the formula attached in the picture, where Xbar is a vector of predictions, X is the vector of predicted values. </span>

5 0
3 years ago
20. The H.M. between 2 and 8 is<br>(1 marks )​
e-lub [12.9K]

Answer as an improper fraction = 16/5

Answer as a mixed number = 3 & 1/5

Answer in decimal form = 3.2

All of those values represent the same thing, but written in a different way.

=============================================================

Explanation:

I'm assuming HM stands for Harmonic Mean in this case.

If so, then we apply the reciprocal operation to each value to get 1/2 and 1/8 (from 2 and 8 respectively).

Add up those fractions:

1/2 + 1/8 = 4/8 + 1/8 = 5/8

Now we'll divide n = 2 over that result. The n = 2 refers to the number of items in the original set.

n divide over (5/8) = 2*(8/5) = 16/5 which is the answer as an improper fraction

-----------

To convert to a mixed number, we can do the following:

16/5 = (15+1)/5

16/5 = 15/5 + 1/5

16/5 = 3 + 1/5

16/5 = 3 & 1/5

Or if you need the answer in decimal form, then using a calculator would get you 16/5 = 3.2

6 0
3 years ago
Please help!!! Math 10 points!
zheka24 [161]

Answer:

First Blank: 20 photos

Second Blank: 6 minutes

Third Blank: 45 Photos

Fourth Blank: 10 minutes.

Step-by-step explanation:

4*5=20 Photos

30/5=6 Minutes

9*5=45 Photos

50/5=10 Minutes

4 0
3 years ago
Read 2 more answers
What is 0.98 as fraction
Montano1993 [528]
0.98 as a unsimplified fraction would be 98/100. The simplified fraction would be 49/50 hope this helped
6 0
3 years ago
Please help me i rlly need help lol i have to written
MissTica
Take the picture clearly because I can’t read nothing
6 0
3 years ago
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