Y = 8
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Answer:
$4.12
Step-by-step explanation:
$26.78 / 6.5 gallons = $4.12 per gallon
Answer: 3.84 · 10^5
Step-by-step explanation:
Answer:
As per the statement:
The path that the object takes as it falls to the ground can be modeled by:
h =-16t^2 + 80t + 300
where
h is the height of the objects and
t is the time (in seconds)
At t = 0 , h = 300 ft
When the objects hit the ground, h = 0
then;
-16t^2+80t+300=0
For a quadratic equation: ax^2+bx+c=0 ......[1]
the solution for the equation is given by:
On comparing the given equation with [1] we have;
a = -16 ,b = 80 and c = 300
then;
Simplify:
= -2.5 sec and = 7.5 sec
Time can't be in negative;
therefore, the time it took the object to hit the ground is 7.5 sec
3x=y
X+Y=20
5=x and 15=y are the answer. You can use elimination or substitution or guess and check!