Answer:
John added 1 +4 +4 to get 9 (12x12 = 144)
Step-by-step explanation:
12x12 actually equals 144
1 + 4 +4 = 9 so it appears John just added all the digits of 144 to get 9
If x +23 = 9, then, x = 9-23.
So x = -14
Answer:
17.65% probability a rider must wait between 1 minute and 1.5 minutes
Step-by-step explanation:
An uniform probability is a case of probability in which each outcome is equally as likely.
For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.
The probability that we find a value X lower than x is between c and d is given by the following formula

For this problem, we have that:


17.65% probability a rider must wait between 1 minute and 1.5 minutes
-1/4 the negative reciprocal of the slope of the red line