Answer:
the total is $25 for a 5 mile ride.
the total is $40 for a 10 mile ride.
Step-by-step explanation:
x*3+y= total
5*3=$15
$15+$10=$25
10*3=$30
$30+$10=$40
Answer:the z score is - 1
Step-by-step explanation:
Assuming a normal distribution for the delivery time of sandwiches by Sammy's Sandwich Shop. We would apply the formula for normal distribution which is expressed as
z = (x - u)/s
Where
x = delivery times
u = mean delivery time
s = standard deviation
From the information given,
u = 25 minutes
s = 2 minutes
We want to determine the z-score for the number of sandwiches delivered in less than 23 minutes. It becomes
z = (23 - 25)/2 = - 1
Answer:
21+3x
Step-by-step explanation:
Expand this:
3(7+x)
So it becomes:
21+3x
20*2=40
40*50=2000
2000/60=33.33
about 33 hours by lifting by hand
