the photograph shows and igneous rock with mineral crystals ranging in size from 2 to 6 millimeters. the rock is composed of 58% plagioclase feldspar, 26% amphibole, and 16% biotite. what is the name of this rock?

Give an example of the type and scale of economic activity for a traditional economy.

The equation 24x2+25x−47ax−2=−8x−3−53ax−2 is true for all values of x≠2a, where a is a constant.what is the value of a? a) -16b) -3c) 3d) 16

Case # 51173878 weighs 814 pounds; case # 51173981 weighs 803 pounds; case # 51174058 weighs 817 pounds; case 51174178 weighs 815 pounds; case # 51174248 weighs 817 pounds; case # 51174495 weighs 781 pounds; case # 51174577 weighs 828 pounds. what are the case #'s of the two cases that weigh the same amount?