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Ivanshal [37]
3 years ago
8

Middle term of the product of (4x - 1)(2x + 5).

Mathematics
2 answers:
inna [77]3 years ago
4 0

Answer:

B

Step-by-step explanation:

i know

maxonik [38]3 years ago
4 0

Answer:

middle term is 18x

Step-by-step explanation:

8x² + 20x + (-2x) - 5

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During a rock concert, the noise level (in decibels) in front row seats has a mean of 92 dB with a standard deviation of 9 dg_ W
rodikova [14]

Answer:

The minimum percentage of noise level readings within 8 standard deviations of the mean is 98.44%.

Step-by-step explanation:

When we do not know the shape of the distribution, we use the Chebyshev's Theorem to find the minimum percentage of a measure within k standard deviations of the mean.

This percentage is:

p = 1 - \frac{1}{k^{2}}

Within 8 standard deviations of the mean

This means that k = 8. So

p = 1 - \frac{1}{8^{2}} = 1 - \frac{1}{64} = \frac{64 - 1}{64} = \frac{63}{64} = 0.9844

The minimum percentage of noise level readings within 8 standard deviations of the mean is 98.44%.

6 0
3 years ago
The slope of a line is negative for use the cordons of the labeled point to find a point-slope equation of the line.
Alexeev081 [22]
For slope m and point (x₁, y₁), the point-slope equation of the line can be written as
  y -y₁ = m(x -x₁)

You have m = -4 and (x₁, y₁) = (4, -9), so the equation of your line is
  D. y+9 = -4(x-4)
5 0
3 years ago
What is the ratio of a to b 9/17= 3a/ a+b<br><br> 3/14<br> 6/17<br> 13/17<br> 50/9
Anarel [89]

Answer:

3/14

Step-by-step explanation:

We want to find the ratio of a to b, or a/b

9/17 = 3a/ (a+b)

Multiply each side by 17

17*9/17 =17* 3a/ (a+b)

9 = 51 a/ (a+b)

Multiply each side by (a+b)

9 (a+b) = 51a

Distribute  the 9

9a +9b = 51a

Subtract 9a from each side

9a-9a +9b =51a-9a

9b = 42a

Divide each side by b

9b/b = 42a/b

9 = 42a/b

Divide each side by 42

9/42 = a/b

But we can simplify 9/42 because each is divisible by 3, so divide 9 and 42 by 3

3/14 = a/b

5 0
3 years ago
What is the x-intercept of the line with the equation 4x + 3y = 12?
belka [17]

To find the x intercept replace y with 0 in the equation and solve for x:

4x +3(0) = 12

Simplify:

4x +0 = 12

4x =12

Divide both sides by 4:

x = 12/4

x = 3

The x intercept would be (3,0)

5 0
3 years ago
What is the vaule of 12(3x+5x),when x=7
german
Fist plug in 7 in to the X values like so 12 (3 (7) +5 (7)) then solve in side the parenthesis 3×7 =21 and 5×7=35 then add them 35+21=56 and then you are left with 12(56) or 12×56= 672

8 0
3 years ago
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