Answer:
55
Step-by-step explanation:
55 is your answer
Answer:
31
Step-by-step explanation:
Answer:
(1) The ordered pairs must lie on the graphed equation
Answer:
![y = -\frac{2}{5}x](https://tex.z-dn.net/?f=y%20%3D%20-%5Cfrac%7B2%7D%7B5%7Dx)
Step-by-step explanation:
We already know the slope of the line: -2/5. So, we can make an equation like this:
![y =- \frac{2}{5}x + b](https://tex.z-dn.net/?f=y%20%3D-%20%5Cfrac%7B2%7D%7B5%7Dx%20%2B%20b)
In the question it gives us both x and y in the point (-5,2). You can plug this back into the equation like this:
![2 = -\frac{2}{5}(-5) + b](https://tex.z-dn.net/?f=2%20%3D%20-%5Cfrac%7B2%7D%7B5%7D%28-5%29%20%2B%20b)
Now, just solve for b to find the y-intercept:
![2 = \frac{10}{5} + b\\2 = 2 + b\\0 = b](https://tex.z-dn.net/?f=2%20%3D%20%5Cfrac%7B10%7D%7B5%7D%20%2B%20b%5C%5C2%20%3D%202%20%2B%20b%5C%5C0%20%3D%20b)
Because b equals 0 there is you can write the final equation like this:
![y = -\frac{2}{5}x](https://tex.z-dn.net/?f=y%20%3D%20-%5Cfrac%7B2%7D%7B5%7Dx)
<em>I hope this helps!!</em>
<em>- Kay :)</em>
=4*pi*radius^2
=4(pi)(4^2)
=4(pi)(16)
=64(pi) sq inches