Answer: 
Step-by-step explanation:
Given
Mark up price is 25% higher than cost price
The shopkeeper gives a discount of 10%
Suppose the cost price is 
Mark up price is 
Selling price is
It is given Rs150
Marked up price is 
B = 1/4c + 14
d = 5/4c - 2
b = d
1/4c + 14 = 5/4c - 2 ....multiply by 4
c + 56 = 5c - 8
56 + 8 = 5c - c
64 = 4c
64/4 = c
16 = c <== Chris
b = 1/4c + 14.....b = 1/4(16) + 14.....b = 4 + 14....b = 18 <== Brian
d = 5/4c - 2....d = 5/4(16) - 2.....d = 20 - 2.....d = 18 <== Damien
solution : Brain and Damien answered 2 more questions correctly then Chris did. <===
Answer:
B. y = x - 2
Step-by-step explanation:
The sale price (y) is $2 less than the original price (x - 2).
To test this out, if a book's original price is $10..
x = 10
Using y = x - 2 and to test out if it works, we'll plug in x = 10 to discover y.
y = 10 - 2
y = 8
Jimmy - j years now
Beth -(j+2) years now
In 3 years
Jimmy - (j+3)
Beth -(j+2+3)=(j+5)
j+3 + j+5=(2j+8) - sum of their ages in 3 years
y years ago
Jimmy - (j-3)
Beth - (j+2-3)= (j-1)
j-3+j-1=(2j - 4) - sum of their ages in 3 years ago
(2j+8) =2(2j - 4)
2j+8 = 4j-8
2j = 16
j = 8
Jimmy - 8 years now
Beth - 8+2=10 years now
