Answer:
just write the expression
Step-by-step explanation:
if its for math but then i dont know
x¹ = -2 x² = -8
y¹ = -1 y² = 12
Using midpoint formula,
M = ( x¹ + x²/2 ,y¹ + ý²/2)
or,M ={ -2+(-8)/2 , (-1) +12/2}
or, =( -10/2 , 11/2)
:M = ( -5 , 11/2)
<span>four over nine of a mile in four over five of an hour
= 4 4
----- / ----
9 5
</span>= 4 5
----- * ----
9 4
= 20
-------
36
= 5
-----
9
answer is : <span>four ninths over four fifths = five over nine mile per hour (first choice)</span>
In the left hand side, you're multiplying 7.8 by 
In the right hand side, you're multiplying again 7.8 by a mysterious number.
So, the unknown number must be 
Every number remains unchanged when multiplied by 1, so the answer is 3.6