Option B
The expression 5g will NOT give Hailey's total cost
<em><u>Solution:</u></em>
Given that Hailey buys 5 guinea pigs at 20% off the original price of g dollars per guinea pig
From given information,
Number of guinea pigs bought = 5
Original price = g dollars
Given that Hailey has bought 5 guinea pigs at 20% off
<em><u>Price at which hailey bought pigs after offer is given as:</u></em>
price per guinea pig after offer = g - 20 % of g
<em><u>Total cost for 5 guinea pigs:</u></em>
Total cost = 5(g - 20% of g)
<em><u>The above expression can be written in different ways:</u></em>
or
or
Thus Option A, Option C, Option D are correct
So Option B will NOT give Hailey's total cost