I need an explanation as to why the other three are wrong aswell

D. An equilateral triangle.

Step-by-step explanation:

• For isosceles triangle » only two sides are equal.

• For scalene triangle » no line is equal to each other

• For right angled triangles » atmost two lines are equal

choice b is correct

step-by-step explanation:

we have been given the following system of inequalities;

we are required to graph the solution to the system of inequalities. using a graphing tool, the graph of the system is as shown in the attachment. the continuous line represents the graph of while the dotted line represents .

{3 + i, 3 - i, 3, -1}

step-by-step explanation: