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3 years ago

13 subtracted from a number x would u write it as 13-x sorry im not that smart

Mathematics

2 answers:

harina [27]3 years ago

5 0

Answer:

$x-13$

Step-by-step explanation:

abruzzese [7]3 years ago

3 0

Answer:

Are you cheating on your test like other 100,000 ppl? it is x - 13

Step-by-step explanation:

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3 years ago

Rewrite e^-5=x in logarithmic form

Agata [3.3K]

Answer:

㏒e(x)= 5

Step-by-step explanation:

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3 years ago

A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the followin

maks197457 [2]

Answer:

(a) $\sum x_i=56.68$ and $\sum x_i^2=197.46$

(b) The sample variance is $s^2=0.530$ and the sample standard deviation is $s=0.728$

Step-by-step explanation:

(a)

The sum of these 17 sample observations is

$\sum x_i=2.79\:+2.57+\:2.73\:+3.75\:+2.27+\:2.75+\:4.00+\:4.22+\:3.88+\:4.35+\:3.41+\:4.57+\:2.38+\:3.73\:+2.75+\:3.47+\:3.06\\\\\sum x_i=56.68$

and the sum of their squares is

$\sum x_i^2=2.79^2\:+2.57^2+\:2.73^2\:+3.75^2\:+2.27^2+\:2.75^2+\:4.00^2+\:4.22^2+\:3.88^2+\:4.35^2+\:3.41^2+\:4.57^2+\:2.38^2+\:3.73^2\:+2.75^2+\:3.47^2+\:3.06^2\\\\\sum x_i^2=197.46$

(b)

The sample variance, denoted by $s^2$ , is given by

$s^2=\frac{S_{xx}}{n-1}$

where $S_{xx} =\sum x_i^2-\frac{(\sum x_i)^2}{n}$

Applying the above formula we get that

$S_{xx}=197.46-\frac{(56.68)^2}{17}\\\\S_{xx} =8.482$

$s^2=\frac{8.482}{17-1}=0.530$

The sample standard deviation, denoted by s, is the (positive) square root of the variance:

$s=\sqrt{s^2}$

Applying the above formula we get that

$s=\sqrt{0.530}=0.728$

3 0

3 years ago

3x + 3(x + y) ? Help!

tatuchka [14]

Answer:

=6x+3y

Step-by-step explanation:

3X+3(X+Y)

Distribute:

=3X+(3)(X)+(3)(Y)

=3X+3X+3Y

Combine Like Terms:

=3x+3x+3y

=(3x+3x)+(3y)

=6x+3y

4 0

3 years ago

Find the diameter of a sphere knowing ONLY the volume. (the volume is 1436.755m^3)

liraira [26]

Formula for the volume of the sphere
$\frac{4}{3} \times \pi \times {r}^{3}$
$= 1436.755$
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3 years ago