Answer:-8 is the first one.
Step-by-step explanation:-3(2)-2
-6-2
Hopefully this helps you understand the rest (and I was just too lazy to do all of them).
Y=-.5x+3
Explanation: Move the x to the other side by subtracting it from both sides, you end up with 10y=30-5x then you divide 10 from both sides and you end up with y=-.5x+3
The correct option is Option 4: 
Step-by-step explanation:
Given
Length of box = l = ab
Width of box = w = a+5b
Height of box = h = 2b^2
The volume of a box is given by:

Putting the values

Hence,
The correct option is Option 4: 
Keywords: Volume, Polynomials
Learn more about polynomials at:
#LearnwithBrainly
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:
300 books
Step-by-step explanation:
10 x 6 = 1 min
50 x 6 = 300