So basically they want you to show 20 answers it already says 4 and you have to find the pattern in this one the pattern is add 6
Answer:
40 60 40 60 40 60 40 60 40
1. 2. 3. 4. 5. 6. 7. 8. 9.
so the answer is 9 hours
First you make -1 3/5 into an improper fraction, -8/5
Since you're dividing a fraction by another fraction you'd change it to -8/5 × -3/2
(Don't forget to flip -2/3 to -3/2)
when you multiply it it'd be 24/10
(It is a positive number because when you multiply two negative numbers it becomes positive)
24/10 as a mixed fraction is 2 1/5
Answer:
10
Step-by-step explanation:
Ground level is where h = 0, so solve the equation ...
h(x) = 0
-5(x -4)^2 +180 = 0 . . . . substitute for h(x)
(x -4)^2 = 36 . . . . . . . . . . divide by -5, add 36
x -4 = 6 . . . . . . . . . . . . . . positive square root*
x = 10 . . . . . . add 4
The object will hit the ground 10 seconds after launch.
_____
* The negative square root also gives an answer that satisfies the equation, but is not in the practical domain. That answer would be x = -2. The equation is only useful for time at and after the launch time: x ≥ 0.
Answer: 
Step-by-step explanation:
The area of a parallelogram can be calculated with the following formula:

Where "b" is the length of any base of the parallelogram and "h" is the height.
In this case you can identify in the figure provided in the exercise, that:

Then, knowing those values, you can substitute them into the formula shown above, as below:

Finally, you must evaluate in order to find the area of the given parallelogram.
You get the following result:
