Factor the polynomial below. 9x squared minus 16y squared

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?