Answer:
A
Step-by-step explanation:
One easy way to determine if a coordinate is a function or not is to look at the number in the x's place only. There should not be the same number on the x's side for a different pair.
Every pair has a different number on the x's side, which is why A is the only possible answer.
 
        
             
        
        
        
Well to do scientific notation u have to use 10 then an exponent 
example: 
2.9867 x 10^10= 29,867,000,000
so u need exponents to do scientific notation.
        
             
        
        
        
Answer:
2x^{3} + x^{2} - 25x + 12
Step-by-step explanation:
There are three different enclosed brackets.
First multiply two of the brackets, then multiply the third by the answer
 
        
             
        
        
        
X=Amount of skittles at the start.
Nasir ate 10 skittles and Seif ate 6 skittles so the number of skittles they had(x) - how many they both ate equals : 2/3;
(x-10)/(x-6)=2/3
3(x-10)=2(x-6)
3x-30=2x-12
x-30=-12
x=18
They each started with 18 skilttles.