Yes the notes you took in class and friends from class as well sites to study from wont help as much and we don't know what part of alg 2 you're on.
You will try all the cases and see if all the equations will match after substituting or no.
1.
5x
put x = 1/2
2.5 isn't equal to 20
4=15x
put x =1/2
15 × 1/3 =7.5
7.5 isn't equal to 4
-4x = 60
put x = 1/2
-4×1/2 = -2
-2 isn't equal to 60
30 = 60x
pit x = 1/2
60 × 1/2 = 30
30 = 30
Therefore, the correct answer is D. 30 = 60x
2. Answer is B. -4 , 4
Put x = -4
l 5 × -4 l = l-20l = 20
20 = 20
Put x = 4
l 5 × 4 l = l20l = 20
20 = 20
Since the birthdays can be on any day of the year and there are 365 days in a year, so we have to consider all the 365 days to calculate the probability using the simulation. This way we are will be able to match both the day and the month of the birth.
So, from the given options, option B is the most suitable
Assign numbers 1 through 365 to represent the days of the year.
1/3- 0.333333
1/6- 0.166666
1/7- 0.142857....0142857....0142857
1/9-0.1111111
I hope this helps
