3. Which is not a quadratic equation? (1) x2 = 81
(2) 3x2 = 5x - 7
(3) 4x + 5 =9-2x
(4) 5x - 7x2 = 21

Pls pls help this is due in 20 mins

Identify the conclusion of the conditional statement. if you live in phoenix, then you live in arizona.

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

Intro biblioteca sunt 462 de carti cu 198 mai putine enciclipedii si cu 47 mai multe dictionare decat enciclopedii cate enciclopedii sunt in biblioteca