(c + d) - 3
would be the algebraic phrase
I would suggest trying 3/15 but I could be wrong
Answer:
the 3rd one
Step-by-step explanation:
i took screenshot fromm desmos here
a straight horizontal line is 180 degrees
box in the middle means that angle is 90 degrees
(s+1) + 90 + (2s-1) = 180
3s + 90 = 180
s = 30