Answer:
Step-by-step explanation:
Let x be the number of adult tickets and y be the number of children's tickets.
We are given that there are total 12 people. Therefore, we can set:
Moreover, we are given that an adult ticket costs $21.50 and a child's ticket costs $14.75, therefore, cost of x adult tickets will be 
and cost of y children's ticket will be 
. We can form the second equation by setting the total cost of tickets as:
Therefore, the required system of equations that could be used to find x and y will be:
The answer is gonna be D if you're using plato<span />
Answer:
20 kg
Step-by-step explanation:
Answer:
2 and 5
Step-by-step explanation:
A linear pair angles are angles on a straight line, whose sum equals to 180°.
Examining the diagram given, angle 2 and angle 5 are on a straight line. Thus, they are a linear pair. Their sum would equal 180°.
Form the options given, the angles that would form a linear pair are:
Angles 2 and 5.
If the expression has only two variables 
and $y$, or if there's just one variable out of these two, then the answer is yes.
If the expression has more variables (other than X and y), then the answer is no.
