What is the perimeter of the isosceles right triangle with hypotenuse 10?

Rectangle pqrs has length a and width 4b. the x-axis bisects ps and qr what are the coordinates of the vertices

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4