To solve this problem you must apply the proccedure shown below:
1. You have the following equation of a parabola, given in the problem above:
x<span>=1/16y^2
2. Then, based on the graph attached, you have:
p=y^2/4x
p=8^2/(4)(4)
p=64/16
p=4
3. The directrix is:
directrix=h-p
directrix=0-4
directrix=-4
The answer is:-4</span>
Answer: 
Step-by-step explanation:
Given equation: 

Since 5 is the greatest common factor of 65 and 60 in the given expression.
Therefore, the above expression can be written as

Hence, by factoring the side that contains the variable p we have the expression
.
Answer:
640.5 cm^2
Step-by-step explanation:
So the formula for trapezoid is height times the average of the bases. So 25+36=61, and then we divide that by 2 to get 30.5 as our average. Then, we take 30.5 and multiply it by 21 and we get 640.5.
Answer:
The answer in the procedure
Step-by-step explanation:
Let
x----> the first number
y----> the second number
we know that

so
-----> equation A
----> equation B
substitute equation A in equation B

