Answer:
The value of a Cartesian product between an empty set and set A is equal to the empty set.
Step-by-step explanation:
The cartesian product is given by:
A×B= {(a,b): a∈A, b∈B}
This means that each element of set A is combined with an element of set B.
The empty set is the unique set having no elements and its size is zero.
Let Ф be the empty set and let A be a set of elements chosen from U.
A×Ф=Ф
Since the empty set has no elements, no ordered pairs can be formed and the result is the empty set.
<em><u>im not sureeeeeeeeeeeeeeeeeeeeeeeee</u></em>
Answer:
a + 8
Step-by-step explanation:
Note that
(x + y)² = x² + 2xy + y²
= x² + y² + 2xy
= a + 2(4) = a + 8
Answer:
43.94?
Step-by-step explanation:
I think if you use inverse cos you should get the correct number. So, to find cos, you need to know the adjacent side and the hypotenuse. Here, the reference angle would be the person holding the kite. The distance from the person to the barn is the adjacent side, which is 18. The string of the kite, I assume, would be 25.
cos(∅) = 
cos(∅) = 0.72
cos⁻¹(0.72) = 43.94
I don't know if that's what you're looking for, but... If it's not correct, lmk so I can rewrite it. :)
The answers would be E,C,B. Hope this helped out it might not be right but trying my best to help out.