The student wrote the wrong operation. "The sum of 5y and 3" translates to 5y+3. And here means addition.
Answer:
Those points are 
units apart.
Answer:
(-6,4)
Step-by-step explanation:
If this is the system of equations here is how:
solve for 1 vairuble in the first equation, and plug that it to the other.
The opposite of 12.1 is 12.2
