Let the number of girls=4x
then number of boys=7x
7x-4x=15
3x=15
x=15/3=5
boys=5*7=35
girls=4*5=20
number of students=35+20=55
I'd say there's a 50-50% probability
Consider two pairs of coordinates (x₁, y₁) and (x₂, y₂), the mid-point of these coordinates are
We have midpoint (-1, 7i) and one pair of coordinate (3, 8i)
The other pair of coordinate would be given by
The value of x is (2 × -1) - 3 = -2 - 3 = -5
The value of y is (2 × 7) - 8 = 14 - 8 = 6
The value of x represents the real part
The value of y represents the imaginary part
The other coordinate is (-5, 6i)
Answer:
the anwer is 2.1
Step-by-step explanation: