The coordinates of a are (0,4) and the x-coordinate of b is 5. what is the y-coordinate of b if ab=13? (two answers are possible.)

*could you give an explanation, i don't understand it but i know the possible answers which are 16 or -8*

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?