The answer is C: first add 2 both sides then divide both sides by -5.
In any cyclic quadrilateral, angles opposite one another are supplementary, meaning

and given that
, we have
.
By the inscribed angle theorem,


and since

we have

and it follows that

Answer:
50
Step-by-step explanation:
n (n + 1) = 2550
n^2 + n = 2550
n = 50
n + 1 = 51
4 quarts are in a single gallon
Answer:
A
Step-by-step explanation: