Answer:
Step-by-step explanation:
![S= \frac{n}{2 [2a + (n - 1)d]}](https://tex.z-dn.net/?f=S%3D%20%5Cfrac%7Bn%7D%7B2%20%5B2a%20%2B%20%28n%20-%201%29d%5D%7D)
Simplifying the fraction by multiplying d into the (n-1) term,
![s=\frac{n}{2 [2a + (n - 1)d] } = \frac{n}{2[2a + dn - d] }](https://tex.z-dn.net/?f=s%3D%5Cfrac%7Bn%7D%7B2%20%5B2a%20%2B%20%28n%20-%201%29d%5D%20%7D%20%3D%20%5Cfrac%7Bn%7D%7B2%5B2a%20%2B%20dn%20-%20d%5D%20%7D)
Simplifying the fraction by multiplying 2 throughout,
Multiply 
on both sides
Cancel the on the right hand side
Multiply s to the terms,
Move 
to the right hand side by subtracting on both sides
On the right hand side of the equation, take out 
Divide Left hand side by 
,
36 and 12
36+12=48 and 36-12=24
Answer:
a=3
b=3
Step-by-step explanation:
(2xy)^4
----------------
4xy
Expand the numerator
2^4 x^4 y^4
---------------------
4xy
Simplify
16 x^4 y^4
---------------------
4xy
We know that a^b / a^c = a^(b-c)
16/4 * x^(4-1) y^(4-1)
4 x^3 y^3
x+7.9=8.5
solving x would be .6
if my answer helps please mark as brainliest.
<h3>
Answer: It's 10.9 </h3><h3>hope this helps have a awesome day/night❤️✨</h3>
Step-by-step explanation:
Step 1
The first step is to set up our division problem with the divisor on the left side and the dividend on the right side, like we have it below:
5 5 2
Step 2
We can work out that the divisor (5) goes into the first digit of the dividend (5), 1 time(s). Now we know that, we can put 1 at the top:
1
5 5 2
Step 3
If we multiply the divisor by the result in the previous step (5 x 1 = 5), we can now add that answer below the dividend:
1
5 5 2
5
Step 4
Next, we will subtract the result from the previous step from the second digit of the dividend (5 - 5 = 0) and write that answer below:
1
5 5 2
- 5
0
Step 5
Move the second digit of the dividend (2) down like so:
1
5 5 2
- 5
2
Step 6
The divisor (5) goes into the bottom number (2), 0 time(s), so we can put 0 on top:
1 0
5 5 2
- 5
2
Step 7
If we multiply the divisor by the result in the previous step (5 x 0 = 0), we can now add that answer below the dividend:
1 0
5 5 2
- 5
2
0
Step 8
Next, we will subtract the result from the previous step from the third digit of the dividend (2 - 0 = 2) and write that answer below:
