Causation might be inferred in correlational studies by invoking parsimony and pattern. Explain how this works.

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2

As a self-employed seamstress, you know that it takes 7 yards of material to make 3 jackets. you bought 15 yards of material to make 7 jackets. did you buy enough material? if not, how much were you over or under?