All categories

3 years ago

Compute the exact value of the function for the given x-value without using a calculator. f(x) = 7x for x = 2

Mathematics

2 answers:

Bas_tet [7]3 years ago

6 0

Answer:

Step-by-step explanation:

Substitute x = 2 into f(x)

f(2) = 7 × 2 = 14

Jobisdone [24]3 years ago

6 0

Answer:

f(x)=14

Step-by-step explanation:

First, you simply plug in x=2 into f(x)=7x

Therefore you are left with f(x)=7(2)

Then you must notice that parenthesis mean multiplication...

And.. 7 x 2 =14

Hence your answer of f(x)=14

You might be interested in

find the angle between the vectors. (first find the exact expression and then approximate to the nearest degree. ) a=[1,2,-2]. B

SashulF [63]

Answer:

$\theta = cos^{-1} (\frac{10}{\sqrt{9} \sqrt{25}})=cos^{-1} (\frac{10}{15}) = cos^{-1} (\frac{2}{3}) = 48.190$

Since the angle between the two vectors is not 180 or 0 degrees we can conclude that are not parallel

And the anfle is approximately $\theta \approx 48$

Step-by-step explanation:

For this case first we need to calculate the dot product of the vectors, and after this if the dot product is not equal to 0 we can calculate the angle between the two vectors in order to see if there are parallel or not.

a=[1,2,-2], b=[4,0,-3,]

The dot product on this case is:

$a b= (1)*(4) + (2)*(0)+ (-2)*(-3)=10$

Since the dot product is not equal to zero then the two vectors are not orthogonal.

Now we can calculate the magnitude of each vector like this:

$|a|= \sqrt{(1)^2 +(2)^2 +(-2)^2}=\sqrt{9} =3$

$|b| =\sqrt{(4)^2 +(0)^2 +(-3)^2}=\sqrt{25}= 5$

And finally we can calculate the angle between the vectors like this:

$cos \theta = \frac{ab}{|a| |b|}$

And the angle is given by:

$\theta = cos^{-1} (\frac{ab}{|a| |b|})$

If we replace we got:

$\theta = cos^{-1} (\frac{10}{\sqrt{9} \sqrt{25}})=cos^{-1} (\frac{10}{15}) = cos^{-1} (\frac{2}{3}) = 48.190$

Since the angle between the two vectors is not 180 or 0 degrees we can conclude that are not parallel

And the anfle is approximately $\theta \approx 48$

3 0

2 years ago

Need asap will give brainliest

patriot [66]

Im not sure, but i think it should be
( -3, 1 )
( -3, -2 )
( -6, -3 )

7 0

2 years ago

Shop Rite has jeans on sale for 3/10 off. Save More has jeans on sale for 33% off. Which store has a better deal? Explain.

umka21 [38]

save more has a better deal because when you convert 33% into a fraction out of ten it becomes 3.3/10 and shop right is 3/10 so 3.3 is greater than 3.

5 0

3 years ago

How do i do 3=4(x-2)+5-3x

SashulF [63]

Answer:

6 = x

Step-by-step explanation:

first, we simplify the parenthesis by distributing the 4

3 = 4(x - 2) + 5 - 3x

3 = 4x - 8 + 5 - 3x

then, you add like terms

3 = x - 3

then add 3 to both sides to isolate x

6 = x

4 0

3 years ago

Read 2 more answers

Can someone help solve this equation?

Furkat [3]

Answer:

(3x+2) + (2x-2) = 2*15

....

6 0

2 years ago