Answer:
D
Step-by-step explanation:
-3 * 2/5 = - 1/2
Also an odd # of negative signs means the answer is going to be negative. (Just a little hint) Hope this helps!! :)
Answer:
One solution at (-2,1)
Step-by-step explanation:
3x+4y=−2.
2x−4y=−8
Add the two equations together
3x+4y=−2
2x−4y=−8
------------------------
5x +0y = -10
Divide by 5
5x/5 = -10/5
x=-2
Now find y
2x-4y = -8
2*-2 -4y = -8
-4-4y = -8
Add 4 to each side
-4+4 -4y = -8+4
-4y = -4
Divide by -4
y = 1
Answer:
The same thing would happen over and over again.
Answer:
y=7600(5^(t/22))
Step-by-step explanation:
This is going to be an exponential function as it grows rapidly.
This type of question can be solved using the formula y=a(r^x), where a is the inital amount, r the factor by which the amount increases and x is the unit of time after which the amount increases.
x=t/22
a=7600
r=5
∴y=7600(5^(t/22))
Answer:
![\large\boxed{\dfrac{16}{81}}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%5Cdfrac%7B16%7D%7B81%7D%7D)
Step-by-step explanation:
The formula of an area of a circle:
![A=\pi r^2](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E2)
r - radius
Circle A:
radius = 4 ft. Substitute:
![A_A=\pi(4^2)=16\pi\ ft^2](https://tex.z-dn.net/?f=A_A%3D%5Cpi%284%5E2%29%3D16%5Cpi%5C%20ft%5E2)
Circle B:
radius = 9 ft. Substitute:
![A_B=\pi(9^2)=81\pi\ ft^2](https://tex.z-dn.net/?f=A_B%3D%5Cpi%289%5E2%29%3D81%5Cpi%5C%20ft%5E2)
The ratio:
![\dfrac{A_A}{A_B}=\dfrac{16}{81}](https://tex.z-dn.net/?f=%5Cdfrac%7BA_A%7D%7BA_B%7D%3D%5Cdfrac%7B16%7D%7B81%7D)