Find the coordinates of the point on the curve y = 2x² - x - 1 at which the gradient is 7
1 answer:
You might be interested in
Hello!
√28x³y³ is equal to
We can find this solution through the following steps.
- Rewriting the equation by factoring 4 from 28, factoring out x², and factoring out y²
- We then can rewrite 4 as 2² in our equation, leaving us with
- We will then move our x and 7, and rewrite
as
- We can then pull the terms from the radical leaving us with
The area formula of a circle is × π.
With that being said, we can solve both problems!
Starting with part A:
-The radius we know is 21cm. From there, we can substitute in our formula with the new value.
x π
From there, we can square our radius:
(21 x 21) x π
(441) x π
And finally, we can multiply by pi to get our answer.
(441) x π
1385.44236023
Which rounded to the nearest tenth is 1385.4. Therefore, the area of the porthole is 1385.4 centimetres.
The second part can be followed with the same process, hopefully you understand the concept enough to where you're comfortable solving problems like this on your own. Feel free to reach out if you have any further trouble!
<em>Hope this helped! :)</em>