When the focus and directrix are used to derive the equation of a parabola, two distances were set equal to each other. = The di
1 answer:
You might be interested in
Keep in mind that you can gather only like terms. Two terms can be summed/subtracted if they involve the same powers of the same variables.
So, going point by point:
- We can subtract the terms, because they both involve the variable
, and we have
- We can sum the terms, because they all involve the variable
, and we have
- We can't sum this terms: 3 is a pure number, while 3r involves the variable r.
- We can only sum the two terms: we have
- We can't sum this terms: -20 is a pure number, while -15p involves the variable p.
- We can sum the terms, because they all involve the variable
, and we have
Answer:
86093440 /129140163
Step-by-step explanation:
Explanation in the Images. I can clarify further if needed.
Answer:
The height of tower .
Step-by-step explanation:
Diagram of the given scenario is shown below.
Given that,
Distance between John and tower is .
Angle of elevation to the top of the tower is °.
Height of John is .
To Find: Height of the tower .
So,
In triangle ΔDCE,
(∠
Now,
To calculate the height of tower we have
≈
Therefore,
The height of tower .
