What is the equation of the circle in general form?

a. x² + y² + 2x + 8y − 47 = 0

b. x²+y² − 2x − 8y + 9 = 0

c. x² + y² + 2x + 8y + 9 = 0

d. x² + y² − 2x − 8y − 47 = 0

explain your answer, you ^-^

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

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.