Subtract and simplify. plz show all work!
(−5y^2 − 9y− 4) − (−2y^2 − y + 8)

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Ineed to know the answer to this algebra question.