Answer: the service charge per hour for premium services is $5.5
the service charge per hour for regular services is $3
Step-by-step explanation:
Let x represent the service charge per hour for premium services.
Let y represent the service charge per hour for regular services.
One customer was charged $38 after spending 2 h in premium areas and 9 regular hours. It means that
2x + 9y = 38- - - - - - - - - - - 1
Another customer spent 3 h in premium areas and 6 regular hours and was charged $34.50. It means that
3x + 6y = 34.5- - - - - - - - - - -2
We would eliminate x by multiplying equation 1 by 3 and equation 2 by 2. It becomes
6x + 27y = 114
6x + 12y = 69
Subtracting, it becomes
15y = 45
y = 45/15
y = 3
Substituting y = 3 into equation 1, it becomes
2x + 9 × 3 = 38
2x + 27 = 38
2x = 38 - 27 = 11
x = 11/2 = 5.5
A) 1, 4, 9, 16, 25, 36, 49, 64, 81, 100
B) 36 + 64 = 80
C) 36 - 25 = 11
False. Not all triangles are equilateral.
Group of students = 18/18 (100%)
Boys = 9/18 (50%)
Boys with brown eyes = 4/18 (idk :p)
It's 4/18 because:
Brown eyed boys make out the 4/9 of the boys, and boys make out the half of the whole class. So the easiest way was to double 9 and get x/18. (Sorry for my bad English..)