Melanie: 15 years old
Kevin: 5 years old
Assume Kevin's present age is x.
That means that 3 years ago, his age would be x - 3.
Melanie's age would be 6(x - 3).
Same thing for 5 years into the future:
Kevin's age would be x + 5.
Melanie's age would be 2(x + 5).
The two equations we have here are:

By subtracting both equations, we are simplified to:
8 = -4x + 28
By solving the equation, we get x = 5.
That means that Kevin's current age is 5 years old.
Melanie's age could be calculated by substituting Kevins'.
6(x - 3) --> 6(5 - 3) --> 12
Since that was 3 years ago, you need to add 3 to 12 to get her current age.
12 + 3 = 15
Melanie's current age is 15 years old.
Answer:
The power of horse is: P = 72000 W
Step-by-step explanation:
Given
To determine
P = ?
Using the formula

The ⋅ in the formula represents a scalar product, defined by:

The angle Ф is zero because F and v are are parallel.
Thus the cosine is 1.
Therefore,
P = (1800) (40.0)
P = 72000 W
Hence, the power of horse is: P = 72000 W
X divided by 4, it's ur expression
Answer:
-5x -5x
-3y=-5x +12
/-5x /-5x
-5-3y=x+12
/-3 /-3
-5+y=x-4
+5 +5
y=x+1<---(y intercept(and it is its slop))
5x-3y = 12
/-3y /-3y
5x=-3y+12
/5 /5
x=-3y+2.4
/-3 /-3
-3+x=y+2.4
+3 +3
x=y+5.4<---(x intercept(not the slop because the y is not the first number))
Answer:(3-8
Step-by-step explanation: