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3 years ago

Solve using foil method (x+9)(x+9)

Mathematics

1 answer:

Fudgin [204]3 years ago

3 0

X^2+9x+9x+81
x^2+18x+81
for factoring it

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What is the LCM of 3 and 7

Dima020 [189]

Answer:

The LCM of 3 and 7 is 21.

Step-by-step explanation:

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3 years ago

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Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence i

Pavlova-9 [17]

Answer:

$\bar X = \frac{Lower +Upper}{2}$

$\bar X= \frac{1.9+3.3}{2}= 2.6$

And the margin of error with this one:

$\bar X = \frac{Upper-Lower}{2}$

$ME = \frac{3.3-1.9}{2}= 0.7$

Step-by-step explanation:

Assuming that the parameter of interest is the sample mean $\mu$ . And we can estimate this parameter with a confidence interval given by this formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

For this case the confidence interval is given by (1.9, 3.3)

Since the confidence interval is symmetrical we can estimate the sample mean with this formula:

$\bar X = \frac{Lower +Upper}{2}$

$\bar X= \frac{1.9+3.3}{2}= 2.6$

And the margin of error with this one:

$\bar X = \frac{Upper-Lower}{2}$

$ME = \frac{3.3-1.9}{2}= 0.7$

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3 years ago

Glasper -U. Hector recorded the amount of coffee he drank (in milliliters) and the duration of his drive (in minutes) over five

AVprozaik [17]

Answer:

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Step-by-step explanation:

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2 years ago

A triangle T is bounded (on three sides) by the lines x = 6, y = 0, and y = 3 2 x. A rectangle of width w is inscribed inside T.

Viktor [21]

Answer:

33.85 units^2

Step-by-step explanation:

you must first draw the triangle on the plane using the equations (see

attached file), you will have a right angle triangle with a height of 192 and a base of 6.

then you calculate the angle with the tangent function = 88.21

Then you use the small triangle to find the value of a (see attached file).

Finally, you propose an equation for X to find one of the sides of the triangle, once you have x squared it, and you already have the area,

i attached procedure

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3 years ago

What is the slope of line m?

maxonik [38]

Answer:

Slope= -0.5

Step-by-step explanation:

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