Answer:
The statement
is a tautology.
Step-by-step explanation:
A tautology is a formula which is "always true" that is, it is true for every assignment of truth values to its simple components.
To show that this statement is a tautology we are going to use a table of logical equivalences:
![P \leftrightarrow [(\lnot P) \rightarrow (Q \land \lnot Q)] \equiv](https://tex.z-dn.net/?f=P%20%5Cleftrightarrow%20%5B%28%5Clnot%20P%29%20%5Crightarrow%20%28Q%20%5Cland%20%5Clnot%20Q%29%5D%20%5Cequiv)
by the logical equivalences involving bi-conditional statements
by the logical equivalences involving conditional statements
by the Double negation law
by De Morgan's law
by the Negation law
by De Morgan's law
by the Double negation law
by the Identity law
by the Idempotent law
by the Commutative law
by the Negation law
by De Morgan's law
by the Idempotent law
by the Distributive law
by the Negation law
by the Domination law

Answer:My family hates me
Step-by-step explanation:
Answer:
The angle between the two vectors is 84.813°.
Step-by-step explanation:
Statement is incomplete. Complete form is presented below:
<em>Let be (6,-3, 1) and (8, 9, -11) vector with same origin. Find the angle between the two vectors. </em>
Let
and
, the angle between the two vectors is determined from definition of dot product:
(1)
Where:
,
- Vectors.
,
- Norms of each vector.
Note: The norm of a vector in rectangular form can be determined by either the Pythagorean Theorem or definition of Dot Product.
If we know that
and
, then the angle between the two vectors is:
![\theta = \cos^{-1}\left[\frac{(6)\cdot (8) + (-3)\cdot (9) + (1)\cdot (-11)}{\sqrt{6^{2}+(-3)^{2}+1^{2}}\cdot \sqrt{8^{2}+9^{2}+(-11)^{2}}} \right]](https://tex.z-dn.net/?f=%5Ctheta%20%3D%20%5Ccos%5E%7B-1%7D%5Cleft%5B%5Cfrac%7B%286%29%5Ccdot%20%288%29%20%2B%20%28-3%29%5Ccdot%20%289%29%20%2B%20%281%29%5Ccdot%20%28-11%29%7D%7B%5Csqrt%7B6%5E%7B2%7D%2B%28-3%29%5E%7B2%7D%2B1%5E%7B2%7D%7D%5Ccdot%20%5Csqrt%7B8%5E%7B2%7D%2B9%5E%7B2%7D%2B%28-11%29%5E%7B2%7D%7D%7D%20%5Cright%5D)

The angle between the two vectors is 84.813°.
You don't need the apothem if the side length is known, the area can be expressed as:
A(n,s)=ns^2/(4tan(180/n)), n=number of sides and s=side length so
A(7,28)=(7*28^2)/(4tan(180/7))
A≈2848.987 ft^2
A≈2849 ft^2 (to the nearest tenth of a square foot)
Simplify. Note the equal sign. What you do to one side, you do to the other. Follow PEMDAS.
Isolate the x.
First, distribute 6 to all terms within the parenthesis
6(-3) = -18
6(4x) = 24x
7x - 18 + 24x = 199
Simplify. Combine like terms
31x - 18 = 199
Isolate the x. Add 18 to both sides
31x - 18 (+18) = 199 (+18)
31x = 199 + 18
31x = 217
Isolate the x. Divide 31 from both sides
31x/31 = 217/31
x = 217/31
x = 7
7 is your answer for x
hope this helps