I’m gonna go with C sorry if I’m wrong
7/8-1/2=13/4
how to get the answer:
u find the lowest common factor for both denominators:8
7/8-1/2
28 -2 26 13
---------- = -------- = --------
8 8 4
Well for starters 5 isn't a composite number, it's a prime number which I assume you are talking about and 5 is a prime number because it cannot be divided by anything but 1.
Relation between fee charged by piano instructor and the lessons has been shown in the graph.
Two points passing through the line are (2, 80) and (4, 140)
Let the one time fee = $b
Hourly charges for the lessons = $x
Equation of the line will be,
y = mx + b
Slope of the line 'm' =
m =
m =
m = 30
y = 30x + b
For point (2, 80),
80 = 30(2) + b
b = 80 - 60
b = 20
Therefore, one time fee charged by the instructor = $20
Since instructor put a coupon to waive off the one time fee, value of the coupon will be = $20
