The quadratic formula is -b plus minus the square root of b^2-4ac all over 2a.
Here, a=1, b=13, and c=30.
The only option that fills in the values correctly is D
Just add that’s by 6 then times it by 5 the add 3 to it
465 -(-45) = x
This creates a double negative which becomes a positive and you solution would be 465+45 =X, X = 510
Answer: d
Step-by-step explanation: because every x has 1 y
Answer: $432
Step-by-step explanation: If he marks up the price by 80% then you multiply the price (240) times 0.8, which is 192. That is how much he marks it up -- $192. SO then you add how much he marks it up to the original price of $242 which is $432.
