Hello,
-1<=y<=1
=============
Answer: x=55 y=145
x=55
35+90=125
125-180=55
y=145
180-35=145
I hope this is good enough:
Answer:
Step-by-step explanation:
We know that the equation that models the height of the ball as a function of time is 
.
Where the initial speed is 80 feet.
When the ball lands on the ground, its height will be 
.
So to know how long it will take the ball to reach the ground, equal h (t) to zero and solve for t.
To solve this quadratic equation we use the quadratic formula.
For an equation of the form:
The quadratic formula is:
In this case
Then
We take the positive solution
Answer: a & b
<u>Step-by-step explanation:</u>
The sum of the probabilities should equal 1.0
a) <u>probability of 5/3 is greater than 1</u> shows that the probability distributions will result in a sum greater than 1.
b) <u>The sum of the probabilities is 31/12</u> shows that the sum of the probability distributions is unequal to 1.0.
c) <u>The result is less than 0</u> is irrelevant. The data could be temperature <em>(or something else which can be measured as a negative value).</em>
d) <u>The probabilities have different denominators</u> is irrelevant. Fractions can be reduced and unlike denominators can be turned into like denominators. The most important thing is that their sum is 1.0.
