39x-20x=38
19x=38
x=2
2 hours later, the ferries will be 38 miles apart
8*3-3*x=6
3x=18
x=6
Abe's horse is travelling at the speed of 6 miles per hour.
Answer : The specific heat of the metal is, 
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.


where,
= specific heat of metal = ?
= specific heat of ice = 
= mass of metal = 1.00 kg
= mass of ice = 1.00 kg
= final temperature of mixture = 
= initial temperature of metal = 
= initial temperature of ice = 
Now put all the given values in the above formula, we get:
![(1.00kg)\times c_1\times (-8.88-5.00)^oC=-[(1.00kg)\times 2000J/kg^oC\times (-8.88-(-24.0))^oC]](https://tex.z-dn.net/?f=%281.00kg%29%5Ctimes%20c_1%5Ctimes%20%28-8.88-5.00%29%5EoC%3D-%5B%281.00kg%29%5Ctimes%202000J%2Fkg%5EoC%5Ctimes%20%28-8.88-%28-24.0%29%29%5EoC%5D)

Therefore, the specific heat of the metal is, 
Answer:

Step-by-step explanation:

Subtract 1 from both sides:


Divide both sides by -7:


For question 4 it would be -3+5/2=2/2=1 for A and for B it would be 5-1/2=4/2=2 which would make the coordinates (1,2) so the answer would be A for the first one (the first answer choice)
C=-4-3/2=-7/2
D= 6+3/2=9/2