Answer:
vertical....
Step-by-step explanation:
NawfSide 38 Baby
Answer:
It is false. Just look at the face of the shape.
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
the triangle has reflected across either x-axis or p-axis. If across x-axis, the triangle needs to translate left and then up (no option for this).
a.
In order to find the common ratio, we just need to divide a term by the term that comes before it.
So using the terms 20 and -5, we have:
![\text{ratio}=\frac{20}{-5}=-4](https://tex.z-dn.net/?f=%5Ctext%7Bratio%7D%3D%5Cfrac%7B20%7D%7B-5%7D%3D-4)
b.
The recursive rule can be found with the formula:
![a_n=a_{n-1}\cdot q](https://tex.z-dn.net/?f=a_n%3Da_%7Bn-1%7D%5Ccdot%20q)
Where an is the nth term and q is the ratio. So we have:
![a_n=a_{n-1}\cdot(-4)](https://tex.z-dn.net/?f=a_n%3Da_%7Bn-1%7D%5Ccdot%28-4%29)
c.
The explicit rule can be written as:
![a_n=a_1\cdot q^{n-1}](https://tex.z-dn.net/?f=a_n%3Da_1%5Ccdot%20q%5E%7Bn-1%7D)
Where an is the nth term, a1 is the first term and q is the ratio. So:
Since you need an isolated variable to use the substitution method, we need to re-arrange one of the equations. This will probably be easiest to do with the first one.
Add 5y to both sides of the first equation.
x=10+5y
Now, in the second equation, put in 10+5y in any spot that has an x.
2(10+5y)-10y=20
Distribute the 2 to both numbers in the parenthesis.
20+10y-10y=20
Combine like terms.
20=20
This means that the two equations are actually the same. You can see this if you multiply the whole first equation by 2
2(x-5y=10)
2x-10y=20, which is the same as the second equation. Therefore, the two equations are actually the same one.