Question

Please help and show work if you can I only need 10, 11 and 12​

Answer 1

Explanation:

10). AD = BC [If ABCD is a parallelogram]

3x + 1 = 6x - 4

6x - 3x = 1 + 4

3x = 5

x =
`(5)/(3)`

11). If ABCD is a parallelogram,

AB = CD

5x - 8 = 2x + 7

5x - 2x = 7 + 8

3x = 15

x = 5

12). If ABCD is a parallelogram,

AB = CD

AB║CD and BD is a transversal intersecting these parallel lines.

∠ABD ≅ ∠BDC [Alternate interior angles]

4x - 1 = x + 38

4x - x = 38 + 1

3x = 39

x = 13