10. if ab = bc, ax = 4x + 5, and
cx = 15, find ac.

AC = 30 units

Step-by-step explanation:

if AB = BC, then this is an isosceles triangle.

further BX intersects the base (AC) of the isosceles triangle at a right angle.

This means that the line of symmetry BX divides triangle ABC into two congruent triangles where AX = CX.

hence AC is

AX + CX

= CX + CX

= 15 + 15

= 30 units

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.