For this case we define the following variable:
- <em>x: number of stamps
</em>
We now write the equation that models the problem:

From here, we clear the value of x.
We have then:

Answer:
The number of stamps he has is:

Answer:6x=
2=
X=1.5
Step-by-step explanation:
Answer:
so, it's 0.1x35=3.5
it will be lowered by 3.5 dollars
Answer:
2500
i think
Step-by-step explanation:
Answer:
9.6 seconds
Step-by-step explanation:
The equation for projectile motion in feet is
where
is the initial velocity in ft/s and
is the initial height in feet.
We are given that the initial upward velocity is
and the initial height is
. Thus, plugging these values into our equation, we get
as our equation for the situation.
The firework will land, assuming it doesn't explode, when
, thus:

Since time can't be negative, then the firework will land after 9.6 seconds, assuming it doesn't explode at the time of landing.