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3 years ago

Solving these quadratics for x using complete the square 3x^2-4x-1=0

Mathematics

1 answer:

ZanzabumX [31]3 years ago

5 0

Answer:

in picture

Step-by-step explanation:

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The slope of the line graphed

katrin2010 [14]

$\displaystyle\bf\\ \text{\bf The slope = }~~\frac{y_2-y_1}{x_2-x_1}=\frac{4-(-4)}{4-(-1)}=\frac{4+4}{4+1}=\boxed{\bf\frac{8}{5}}$

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4 years ago

if a 100 n weight sits on a scale in a express elevator, what will happen to the weight shown on the scale when the elevator acc

Whitepunk [10]

Answer:

The phrasing of the question is weird, but the mass should not change. The scale may read higher for a moment, but once the mass is brought up to the same velocity of the elevator, it should settle back to 100.

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3 years ago

What is the simplified form of the following expression

bazaltina [42]

the second option

Step-by-step explanation:

root 4 16 is 2

root 4 powers mean divide by 4

6 0

3 years ago

Five students visiting the student health center for a free dental examination during National Dental Hygiene Month were asked h

Andrews [41]

Answer:

[0.9 months, 32.69 months]

Step-by-step explanation:

The mean is

$\bf \bar x=\frac{5+17+12+21+29}{5}=16.8$

The standard deviation is

$\bf s=\sqrt{\frac{(5-16.8)^2+(17-16.8)^2+(12-16.8)^2+(21-16.8)^2+(29-16.8)^2}{5}}=8.1092$

Now, we have to find two values a and b such that the area under the Normal curve with mean 16.8 and standard deviation 8.1092 between a and b equals <em>95% = 0.95 </em>

Using a spreadsheet we find these values are

a = 0.906

b = 32.694

<h3>(See picture) </h3>

and our 95% confidence interval for the mean number of months elapsed since the last visit to a dentist for the population of students participating in the program rounded to two decimal places is

[0.9 months, 32.69 months]

4 0

3 years ago

What is the value of the expression 9 + (fraction 1 over 2)4 ⋅ 48?

lyudmila [28]

Answer -> (12) I'm very late haha but hopes this helps!

3 0

3 years ago