Answer:


Step-by-step explanation:
<em>See Attachment for complete question</em>
To determine which of the options has (-4,2) as its solution; we have to test each linear combination until we arrive at an answer;
Given that

Testing Option A


Substitute
and
in 

Open Brackets


Substitute
and
in 

Open Brackets


<em>In both cases, the expression on the right hand side equates to that on the left hand side; </em>
<em>Hence, there's no need to check for other options. </em>
The class starts out with 26 students, of whom 12 are girls and, perhaps unlike Mr Morris, are sure of it.
The probability of the first random choice being a girl is 12/26. If successful, there are now 25 students left, of whom 11 are girls. The probability of a girl on the 2nd random choice is 11/25. The probability that BOTH random choices are successful is (12/26) x (11/25). That's (132/650), or about 20.31% (rounded).
Scott starts with 25 plus the 100 from his grandfather making 125 then subtract 50 that he traded so you get 75