Answer:

Step-by-step explanation:
From the question we are told that:
Cost Price 
Sale Price 
Generally the equation for Profit P is mathematically given by



Therefore as a percentage
Percentage Profit X is given as


Answer:
13 is Prime
Step-by-step explanation:
Answer:
a+51=90
a+51+90=180
39
Step-by-step explanation:
hope this helped :)
B....................................................................................