Should be the first one. All you have to do is plug in the x-value for each set of pairs into each equation. If the equation fits the points, then the y-value should match the y.
Assuming that only one choice of music can be made then the question is simple.
20 + 40 = 60 students
Answer:
Step-by-step explanation:
y = 2(x - 2) - 3
Answer:
800 bacteria
Step-by-step explanation:
Over here, we have exponential growth.
So we have 50 bacteria
Every 30 minutes, it doubles in size
In 120 minutes, there are four 30 minutes.
So you do 50 * 2 * 2 * 2 * 2
Do that out and you get 800
Let me know if you have any questions