18-4x=7x+7
(subtract 7 from both sides)
11-4x=7x
(Add 4x to both sides)
11=11x
(divide both sides by 11)
X=1
Answer:
The number of trees in each row is 21.
Step-by-step explanation:
Let us assume the number of trees in each row = m
So, the number of rows in the orchard = Number of trees in each row + 10
or, total number of trees in each row = (10 +m)
Now, Total number of Trees = Number of Rows x Number of trees in 1 row
⇒ 651 = m (m + 10)

⇒ (m +31) = 0, or (m-21) = 0
⇒ m= -31, or m = 21
Now, as m = The number of trees in each row, so m ≠ -31
So, m = 21
Hence, the number of trees in each row is m = 21.
Answer:
6 meters
Step-by-step explanation:
Set up a proportion as 18/x=6/2. The meters are unknown, so that's what the x value represents. Then, cross multiply (18 times 2 and 6 times x) to get 36=6x. By dividing both sides of the equation by 6, you'll get 6 meters as your answer.
HAVE A GREAT DAY!!! :D
Answer:
The ratio of the first term to the common difference is 1 : 2
Step-by-step explanation:
The rule of the sum of the AP is
, where
a is the first number
d is the common difference
n is the position of the number
∵
= 4 ×
⇒ (1)
→ Find
and 
∵ In
n = 10
∴ ![S_{10}=\frac{10}{2}[2a+(10-1)d]](https://tex.z-dn.net/?f=S_%7B10%7D%3D%5Cfrac%7B10%7D%7B2%7D%5B2a%2B%2810-1%29d%5D)
∴ ![S_{10}=5[2a+9d]](https://tex.z-dn.net/?f=S_%7B10%7D%3D5%5B2a%2B9d%5D)
∴
= 10a + 45d ⇒ (2)
∵ In
n = 5
∴ ![S_{5}=\frac{5}{2}[2a+(5-1)d]](https://tex.z-dn.net/?f=S_%7B5%7D%3D%5Cfrac%7B5%7D%7B2%7D%5B2a%2B%285-1%29d%5D)
∴ ![S_{5}=2.5[2a+4d]](https://tex.z-dn.net/?f=S_%7B5%7D%3D2.5%5B2a%2B4d%5D)
∴
= 5a + 10d ⇒ (3)
→ Substitute (2) and (3) in (1)
∵ 10a + 45d = 4[5a + 10d]
∴ 10a +45d = 20a + 40d
→ Subtract 40d from both sides
∴ 10a + 45d - 40d = 20a + 40d - 40d
∴ 10a + 5d = 20a
→ Subtract 10a from both sides
∴ 10a - 10a + 5d = 20a - 10a
∴ 5d = 10a
→ Divide both sides by 5
∴ d = 2a
→ That means d is twice a or a is half d
∴ a : d = 1 : 2
The ratio of the first term to the common difference is 1 : 2
Oh yeah I don’t know ♂️ lol oh yeah I just