5x+2y-z=-5
-x+3y+4z=12
x-y-3z=-8

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i