This is the concept of combination. The number of letter-sequence that are possible to be formed from the letters q,u,a,k,e,s will be evaluated as follows:
Total number of letters is 6
Maximum number of letters in a word is 4
thus the number of four letter sequence that can be formed will be:
6C4
=15
The reason why we are using combination is because no letter can be used more than once in each sequence.
Answer:
Step-by-step explanation:
just add them all together . and the 2 beside the cm just multiply the answer by two .
"Regular quadrilateral" means it has four sides, and the
sides AND the inside angles are all equal.
-- The one at the upper left is a rhombus. All 4 of its sides
are the same length, and the first time I saw it, I picked it.
But then I remembered that in order to be 'regular', the
inside angles also have to be equal, and in a rhombus,
they're not.
-- The one in the lower right is a square. It has four sides,
they're all equal, and the inside angles are all the same too.
So the square is the only one that does the job for you.
The answer is 7, because you multiply it by 6.
Answer:
see explanation
Step-by-step explanation:
Consider the left side
Using the trigonometric identities
csc x = and sec x =
Note that sin( - x) = cos x
Hence
csc( - x)
=
=
= sec x = right side ⇒ proven