Answer: D. -0.6
Step-by-step explanation:
Z score formula= x-mean/ SD
34-40/10= -3/5= -0.6
Answer:
Equation : y = 4x + 55.50
x = 1.9 gigabytes
Step-by-step explanation:
Given that:
Flat fee per month = $55.50
Cost per gigabyte = $4
Let,
x be the number of gigabytes.
y be the total cost
y = 4x + 55.50
Lily wants to keep her bill $63.10
63.10 = 4x + 55.50
63.10 - 55.50 = 4x
4x = 7.60
Dividing both sides by 4

Hence,
Equation : y = 4x + 55.50
x = 1.9 gigabytes
Both angles should be 90degrees
Answer:
26 customers
Step-by-step explanation:
Represent customers entering as y and those buying hot dogs as x


Required
Determine the number of people buying hotdogs (x)
Substitute 4x + 9 for y in the second equation

Collect Like Terms

