Answer:
45
Step-by-step explanation:
In an inverse variation situation, we have mathematical relationship between two variables which can be expressed by an equation in which the product of two variables is equal to a constant.
So in this case: x*y is a constant
since x=9 and y=5 so
xy = 45
the constant of variation is 45
For inverse function, we usually write it as 
12x-8y=-60
48x+24y=600
3x-2y=-15
2x+y=25
So y=25-2x
So 3x-2(25-2x)=-15
3x-50+4x=-15
7x=35
X=5
So y=25-10=15
Answer:
Step-by-step explanation:
is our quadratic,where h(t) is the height of the object after t seconds. If we are looking for how long, t, it takes the object to hit the ground, h(t) will be equal to 0 since the height of something on the ground is 0. We set the quadratic equal to zero and factor it using the quadratic formula:
and
and
and
the 2 solutions are:
and

and since time can never be negative, we know that it takes 4.98 seconds for the rock to hit the ground under the given conditions.
Answer:
b^2
Step-by-step explanation: