Determine the equation of the graph and select the correct answer below.
(-1, 3)
courtesy of texas instruments
a. y= -(x+1)^2 +3
b. y= -(x-1)^2 +3
c. y=(x+1)^2 +3
d. y=(x-1)^2 -3

This is so hard and it’s for a test

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.

On tuesday, a local hamburger shop sold a combined total of 375 hamburgers and cheeseburgers. the number of cheeseburgers sold was two times the number of hamburgers sold. how many hamburgers were sold on tuesday?