Answer:
true
Step-by-step explanation:
5, 10 and 8 all need to equal the same number for it to be the exact same day. 5, 10, and 8 go into 40
2x - 2y = -4
-3x -3y = 0
_____________________
-1x - 5y = -4
Answer:
10
Step-by-step explanation:
Answer:

And we can assume a normal distribution and then we can solve the problem with the z score formula given by:

And replacing we got:


We can find the probability of interest using the normal standard table and with the following difference:

Step-by-step explanation:
Let X the random variable who represent the expense and we assume the following parameters:

And for this case we want to find the percent of his expense between 38.6 and 57.8 so we want this probability:

And we can assume a normal distribution and then we can solve the problem with the z score formula given by:

And replacing we got:


We can find the probability of interest using the normal standard table and with the following difference:
