Relations are subsets of products A×BA×B where AA is the domain and BB the codomain of the relation.
<span>A function <span>ff</span> is a relation with a special property: for each <span><span>a∈A</span><span>a∈A</span></span> there is a unique <span><span>b∈B</span><span>b∈B</span></span> s.t. <span><span>⟨a,b⟩∈f</span><span>⟨a,b⟩∈f</span></span>.This unique <span>bb</span> is denoted as <span><span>f(a)</span><span>f(a)</span></span> and the 'range' of function <span>ff</span> is the set <span><span>{f(a)∣a∈A}⊆B</span><span>{f(a)∣a∈A}⊆B</span></span>.You could also use the notation <span><span>{b∈B∣∃a∈A<span>[<span>⟨a,b⟩∈f</span>]</span>}</span><span>{b∈B∣∃a∈A<span>[<span>⟨a,b⟩∈f</span>]</span>}</span></span>Applying that on a relation <span>RR</span> it becomes <span><span>{b∈B∣∃a∈A<span>[<span>⟨a,b⟩∈R</span>]</span>}</span><span>{b∈B∣∃a∈A<span>[<span>⟨a,b⟩∈R</span>]</span>}</span></span>That set can be labeled as the range of relation <span>RR</span>.</span>
Answer: There isn't a possible way you can really answer this question because I don't know how much one piece cost in the first place , but if I had to guess I would say around 50-80 dollars for a cake is enough for 57 guests.
explanation: I say this because I know usually cakes for a decent amount of people are around 50-80 dollars.
Answer:
y = -2x + 5
Step-by-step explanation:
slope-intercept form: y = mx + b
Hope this helps:)
Answer:
The area is ![28\ m^{2}](https://tex.z-dn.net/?f=28%5C%20m%5E%7B2%7D)
Step-by-step explanation:
I assume that the figure is a square
The area of a square is equal to
![A=b^{2}](https://tex.z-dn.net/?f=A%3Db%5E%7B2%7D)
where
b is the length side of the square
In this problem we have
![b=2(\sqrt{7})=2\sqrt{7}\ m](https://tex.z-dn.net/?f=b%3D2%28%5Csqrt%7B7%7D%29%3D2%5Csqrt%7B7%7D%5C%20m)
substitute in the formula
![A=(2\sqrt{7})^{2}](https://tex.z-dn.net/?f=A%3D%282%5Csqrt%7B7%7D%29%5E%7B2%7D)
![A=28\ m^{2}](https://tex.z-dn.net/?f=A%3D28%5C%20m%5E%7B2%7D)