The unit cell of topaz is made of three pairs of rectangular faces, each pair a different size than the others. the faces are oriented at 90 degree angles to one another. what type of crystal system is this?

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

(05.02) mr. morris is going to save money and replace his sailboat's mainsail himself. he must determine the area of the mainsail in order to buy the correct amount of material. calculate the area of the parallelogram to determine how much material should be purchased. be sure to explain how to decompose this shape into rectangles and triangles. describe their dimensions and show your work.

Simplify 1 divided by 2/3 x (-3) divided by 1/6 x (-10)