Question 2 of 20 :
select the best answer for the question.
2. simplify (3a4 - 2a2 + 5a - 10) - (2a4 +
4a2 + 5a - 2).
o a. a4 – 6a² – 8
o b. a4 + 4a? + 10a - 12
o c. 5a4 + 4a3 + 3a? + 10a - 12
o d. a4 + 2a? + 10a - 12

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Formulate alisha has a number in mind. if she adds three to her number the result is less than five. use this information to write and solve an inequality about alisha's number. then graph the solution set.