Triangles A B C and A B F are congruent. Triangle A B C is reflected across line B A to form triangle A B F. Which rigid transformation would map ΔABC to ΔABF? a rotation about point A a reflection across the line containing CB a reflection across the line containing BA a rotation about point B

In the instructions it states ABC is reflected over line BA. So the rigid transformation is "a reflection across the line containing BA"

ad = ae + ed = y + 7

similar triangles therefor

ac/ab = ad/ae

6/4 = (y + 7) / y

cross multiply

6y = 4(y + 7)

6y = 4y + 28

2y = 28

y = 14

step-by-step explanation:

i believe the answer is d.

hope it you! : d