Answer:
It has no real solutions.
Step-by-step explanation
Once you calculate the discriminant, D= (-10)^2 -4 (8)(15), you simplify the expression to get D= -380, which has no real solutions.
Answer:
D. 7.8
Step-by-step explanation:
Distance formula: 
Substituting (-2 - 3)² + (-5 - 1)²
Distance = 
Distance = 
Distance = 7.8
Use the protractor. Put the purple dot on the vertice and the make sure the line is lined up with the bottom and your answer should be lined up.
4^2 + b^2 = 12^2
16 + b^2 = 144
B^2 = 144-16
B^2 = 128
B= 11.3