All categories

2 years ago

For the function f(x)=-3x+2, find f(2)=

Mathematics

1 answer:

dsp732 years ago

8 0

Answer: f(2) = -4

Step-by-step explanation: Here we're given the function f(x) = -3x + 2 and we are asked to find f(2).

In other words, if we put an <em>x</em> into our function, we get a -3x + 2 out so what happens when we put a 2 into the function?

Well if we put a 2 into the function,

that's f(2) and we get -3(2) + 2 out.

Now all we have to do is simplify on the right side.

-3(2) is -6 so we have -6 + 2 which is -4.

So f(2) is -4.

You might be interested in

Find the slope of the line containing the points (-3, 8) and (-1, 0).

ivolga24 [154]

B) -4
Hope this helps!

4 0

2 years ago

Read 2 more answers

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 <em>s</em>, 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

2 years ago

Sweet T has 2 orange pick for every 5 green. If there are 21 picks in all

mamaluj [8]

2/5=x/21
x=8.4
the answer is 8 oranges

8 0

2 years ago

Read 2 more answers

Which expressions are equivalent to 2(-6c+3)+4c Choose all answers that apply: (Choice A) A -8c+6 (Choice B) B 3(-4c+2) (Choice

natita [175]

Answer:

A. -8c+6

Step-by-step explanation:

2(-6c+3)+4c

=-12c+6+4c

=-8c+6

6 0

2 years ago

2. The duration of the ride is 15 min. (a) How many times does the last passenger who boarded the ride make a complete loop on t

nlexa [21]

Answer: 23

Step-by-step explanation:

6 0

2 years ago