Answer:
A. 3s
Step-by-step explanation:
The height of the object after t seconds is given by:

When will the object hit the ground?
It hits the ground after t seconds, and t is found when
. So







3 seconds, so the correct answer is given by option a.
2n+6=2n+6
0=0
inconsistent solutions
For this case we must resolve the following inequality:

Adding 7 to both sides of the inequality:

Different signs are subtracted and the major sign is placed.

Thus, the solution is given by all the values of "x" less than -5.
The solution set is: (-∞, - 5)
Answer:

See attached image
4y - 8 - 2y + 5 = 0
2y - 3 = 0
2y = 3
y = 3/2
No; we have
. Substituting these into the DE gives

which reduces to
, true only for
.