6. Quadrilateral ABCD has vertices at A(0,6), B(4,-1), C(-4,0) and D(-8, 7). Prove that: (a) ABCD is a rhombus using the distance formula
(b) The diagonals of ABCD are perpendicular​

And explain how you got it so i can understand future problems : 3

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to