Answer:
x = 21.013155617496
Step-by-step explanation:
we have a right triangle then ,

Then

Then
x ≈ 21
Answer:
No, they are not equivalent
Step-by-step explanation:

Answer:
(-1, -7)
Step-by-step explanation:
Used desmos, also, in these situations I believe you can take the number inside the brackets and make it negative and keep the number outside the same to find the vertex.