After taking three of the four in history class, Srinivasa has an average exam score of 66 points. If the forth exam counts twice as much as the other exams, what is the fewest points Srinivasa can score on the fourth exam to pass the course with an overall exam average at least 70 points.

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

answer is 144

step-by-step explanation:

step- i d k and i d c : )

you: : 0

bye

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation