Answer:
P₂ = (-3, 10)
Step-by-step explanation:
The midpoint, (a, b) = (-5, 3)
The starting point, P₁ = (x₁, y₁) = (-7, 4)
Let P₂ = (x₂, y₂)
The formulae for the coordinates of the midpoint are:

To solve for x₂, substitute a = -5, x₁ = -7 into the formula

To solve for y₂, substitute b = 3, y₁ = -4 into the formula

Therefore, P₂ = (-3, 10)