3 x 5 = 15 because the opposite of dividing is multiplying
There is no answer because there cannot be one to one function inverse.
We can solve this using substitution.
because x-y=2.5
x=y+2.5
Now substitute x into other equation.
2(y+2.5)^2-2y=125
2y^2+10y+12.5-2y=125
2y^2+8y-112.5=0
Now comes the ugly part
y=-4+-sqrt(16+900)
y=-4+-sqrt916
y=-4+-2sqrt229
x=-1.5+-2sqrt229
Answer:

Step-by-step explanation:
Since this sequence starts with -5 and decreases by 2 with each term, its rule would be:

Hope this helps!
Answer:
around 1.3
Step-by-step explanation: