Answer:
y = -2+
and y = -2 -
combined, or 
Step-by-step explanation:

substitute y for x and x for y

this is technically the inverse but I will simplify further
x = 
±
= y+2
y = -2±
y = -2+
and y = -2 -
combined
9.75-3.50=2.50x
6.25=2.50x
6.25÷2.5=2.50x÷2.5
2.5=x
The sample space would be 27. The probability of getting 3 heads if you flip 3 pennies is 1/27.
Hope it helps! :)
The answer would be A. 344000 and H=6 :)