7x = 40
7x + 4y = 40
The first equation represents that in total, the 7 tickets whether they are for adults or children costs $40.
The second equation represents that x = adult and y = children tickets both add up to equal $40.
The answer is B ! as vertex is (6,3) and axis of symmetry lies on x=6 !
if you need explanation, comment !
The activation energy is the amount of energy required to initiate a certain reaction. The activation energy may considered as an "energy barrier" that has to be overcome in order for a reaction to begin. If a reaction has a lower activation energy, then it will occur more easily and at a faster rate than a reaction with a higher activation energy. Therefore, the reason that reaction 1 is faster than reaction 2 is because it has a lower activation energy than reaction 2.
Answer:
1st, 3rd, 4th, 2nd
Step-by-step explanation:
