Solve the equation 4x^2-12x=7 algebraically for x

Mathematics

1 answer:

True [87]3 years ago

6 0

Answer:

Step-by-step explanation:

4x^2-12x=7

x= -1/2 and 7/2

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In a survey of women the mean height was 62.5 inches with standard deviation of 2.82 inches. What height represents the 95th per

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Example: In a survey of women in a certain country (ages 20-29) the mean height 63.7 inches with a standard deviations 2.65 inches. What is the height that represent 85 perentile ? what is the height represent First quartile

answer: in a survey of women in a certain country (ages 20-29) the mean height 63.7 inches with a standard deviations 2.65 inches.
What is the height that represent 85 percentile ?
Find the z-value of the 85th percentile::
invNorm(0.85) = 1.0364
Find the corresponding height value::
h = z*s + u
h = 1.0364*2.65 + 63.7
h = 66.47"

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3 years ago

For the function f(x) = 2 - 3x, find f(-4). Options are in the picture.

Kitty [74]

You just have to plug in -4 into
$f(x) = 2 - 3x$
This implies that,
$f( - 4) = 2 - 3( - 4)$

$f( - 4) = 2 + 3(4)$
$f( - 4) = 2 + 12$
$f( - 4) = 14$

4 0

3 years ago

If anybody knows the answer to this please help as soon as possible

zheka24 [161]

Answer:

Because we know the height of the mailbox is 4 feet and the length is 6 feet, and we also know that it's located 54 feet from the base of the flagpole, we can use proportions to solve the problem.

$\frac{4}{6\\}$ = $\frac{x}{54}$