The coordinates of the endpoints of the base of an isosceles triangle are (4,3) and (10,3). The coordinates of the vertex of this triangle could be
A. (3,7)
B. (4,7)
C. (4,-4)
D. (7,-4)

Step-by-step explanation:

Given

Attached number lines

Required

Express as:

The two points on the number line represent x and c (in no particular) respectively.

Solving (a):

Let:

So:

Solve the expression in the absolute bracket

Remove absolute bracket

So: the expression is;

Solving (b):

Let:

So:

Solve the expression in the absolute bracket

Remove absolute bracket

So: the expression is;