Question

9th-grade geometry
Find AB

Answer 1

AB=2

Explanation:

10x-8=3x+6

7x-8=6

7x=14

x=2

Answer 2

d)AB = 12

Explanation:

ΔADB ≅ ΔADC

⇒ AB ≅ AC {Corresponding parts of congruent triangles}

10x - 8 = 3x +6

Add 8 to both sides

10x = 3x + 6 + 8

10x = 3x + 14

Subtract 3x from both sides

10x - 3x = 14

7x = 14

Divide both sides by 7

x = 14/7

x = 2

AB = 10x - 8

= 10*2 - 8

= 20 - 8

AB= 12