Let the cost of the hair dryer equal x.
The net cost plus a 40% markup equals 42, set up an equation and solve forex.
1.4x = 42
Divide both sides by 1.4
X = 42 / 1.4
X = 30
The net cost was £30
5≤x≤9 it can also be reversed as 9≥x≥5 which is the same thing
Answer:
0, 1, 3, 6, 10, 15, 21, 28, 36, 45
square root of (9-6)^2 +(5-1)^2 = 5
the distance is 5 units
