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Nitella [24]
3 years ago
5

Which

Mathematics
1 answer:
garik1379 [7]3 years ago
3 0
B.

Because when doing the math, letter B fits the criteria of a quadratic equation. Which is ax^2 + bx + c = 0.

A is wrong because if we were to do the math, there would be no ax^2. The most important thing in a quadratic equation is the term ax^2, bx and c do not matter as much.

C is wrong because there cannot be a greater exponent than ^2.

D is wrong because of the same reason as letter a.
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Suppose the line of best fit is being found for some data points that have an r-value of 0.657. If the standard deviation of the
oksian1 [2.3K]
We are given a line with the following data:

r-value = 0.657 (r)
standard deviation of x-coordinates = 2.445 (Sx)
standard deviation of y-coordinates = 9.902 (Sy)

We are asked to find the slope of the line up to 3 decimal places.

To find the slope of the line, based on the data that we have, we can use this formula:

slope, b = r * (Sy / Sx) 

substitute the values to the formula:

b = 0.657 * ( 9.902 / 2.445 )

Solve for the b.

Therefore, the slope of the line is 

b = 2.66078, round off to three decimal places:

b = 2.661 is the slope of the line. 
5 0
3 years ago
Read 2 more answers
Solve for b.<br><br> b+(−1.9)=−3.7<br><br> Enter your answer in the box
Luda [366]

Answer:

  • b = -1.8

Step-by-step Solution:

<u>Subtract or add to obtain your answer.</u>

  • b + (−1.9) = −3.7
  • => b - 1.9 = -3.7
  • => b = -3.7 + 1.9
  • => b = -1.8

Hence, the value of b is -1.8

5 0
2 years ago
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Two sides of a right triangle measure 5 inches and 6 nches, and the third side measures 61 inches.
Advocard [28]

Answer:

The length of the third side is 7.81 inches and the perimeter of the triangle is about 18.81 inches

Step-by-step explanation:

4 0
3 years ago
What values are not in the domain of (-5+2x^2)/7-8x ?
NemiM [27]

\frac{-5 + 2x^{2}}{7 - 8x}

The denominator cannot equal zero.

7 - 8x ≠ 0

7       ≠  8x

    \frac{7}{8} \neq \frac{8x}{8}

\frac{7}{8} \neq x

Answer: \frac{7}{8} is not in the domain

4 0
4 years ago
What is the sine value of 2 pi over 3? negative 1 over 2 1 over 2 negative square root 3 over 2 square root 3 over 2
MatroZZZ [7]

Answer:

\large\boxed{\sin\dfrac{2\pi}{3}=\dfrac{\sqrt3}{2}}

Step-by-step explanation:

\sin\dfrac{2\pi}{3}=\sin\bigg(\pi-\dfrac{\pi}{3}\bigg)\\\\\text{use}\ \sin(x-y)=\sin x\cos y-\sin y\cos x\\\\=\sin\pi\cos\dfrac{\pi}{3}-\sin\dfrac{\pi}{3}\cos\pi\\\\\text{use the table from the attachment}\\\\\sin\pi=0\\\\\cos\dfrac{\pi}{3}=\dfrac{1}{2}\\\\\sin\dfrac{\pi}{3}=\dfrac{\sqrt3}{2}\\\\\cod\pi=-1\\\\\text{subtitute:}\\\\=(0)\left(\dfrac{1}{2}\right)-\left(\dfrac{\sqrt3}{2}\right)(-1)=\dfrac{\sqrt3}{2}

7 0
3 years ago
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