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sineoko [7]
3 years ago
13

Simplify the the problem 2x^2-4x-390=0 ​

Mathematics
1 answer:
Sergio039 [100]3 years ago
7 0

Answer:

The answer is <em>-195</em>

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Yes, they are equivalent
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To study the effectiveness of vitamin C in preventing colds, a researcher recruited 200 volunteers. She randomly assigned 100 of
Paul [167]

Answer:

The claim made by the researcher lacks the validity on basis of reasons as indicated in the explanation.

Step-by-step explanation:

The claim made by the researcher is not valid on basis of following reasons:

  1. Interacting variables are not mapped accurately. The additional variables as the health status of the volunteers, eating and fitness habits are not considered in the consideration. This results in a in complete validation.
  2. The placebo effect is not catered accordingly. As the half of the volunteers are taking nothing, this is not the direct influence of the placebo and thus double-blinded testing for placebo effect is to be ensured in future experiments.
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Solve for d when t = 0, t = 3, t = 5 d = t2 asap
rjkz [21]

Answer:

see below

Step-by-step explanation:

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t =0

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t =3

 d = 3^2 = 9

t =5

 d = 5^2 = 25

5 0
3 years ago
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A circle has a diameter of 20 inches and a central angle AOB that measures 160°. What is the length of the intercepted arc AB? U
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Calculate the circumference of the full circle:

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divide 160 by 360 (full circle) and multiply by the circumference:

160/360 x 62.8 = 27.9 inches

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Answer:

very cute

Step-by-step explanation:

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