In order to find the <u>common difference</u> of the data in the problem you have to follow those steps
we know that
In an <u>Arithmetic Sequence</u> the difference between one term and the next is a constant. This constant is called <u>common difference</u>
Let




so



therefore
the answer is
the common difference is 
Answer:
angles 1, 5, 7
Step-by-step explanation:
∡1 = ∡3 reason: they are vertical angles
∡7 = ∡3 reason: they are corresponding angles
∡5 = ∡3 reason: they are same-side interior angles

The value of x is 3
Step-by-step explanation:

The value of x

4 : 9 = (5x + 13) : 63

we can write this as

Now we will cross multiply the values

You have the following inequality:

In order to determine which are valid solutions of the previous inequality, take into account that any positive value for V is solution of the previous equation, because if V is positive, 96/V is also positive.
Then, the following area solutions:
V = 3
V = 6
V = 8
V = 4
1x=-1
that means whererever you see x, you replace it with -1
x is a placeholder for an unknown number
so repolace it
-1+5=4
5-1=4
true