Which of the following is not a way to prove a quadrilateral is a parallelogram? 1.) Show that one pair of opposite sides is both congruent and parallel
2.) Show that both pairs of opposite angles are congruent
3.) Show that both diagonals are congruent
4.) Show that consecutive angles are supplementary

Shryia read a 481 -page-long book cover to cover in a single session, at a constant rate. after reading for 1.5 hours, she had 403 pages left to read. how fast was shryia reading? pages per hour how long did it take her to read the entire book? hours plz i realy need this

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?