I think it’s A im not sure
(2/7)m - (1/7) = 3/14
2m/7 =(3/14) + (1/7)
2m/7 = (3/14) + 2(1/7)
here we are multiplying 2 with 1/7 to make the denominator same for addition.
2m/7 = (3/14) +(2/14)
2m/7 = (3 + 2)/14
2m/7 = 5/14
2m = (5 *7)/14
2m = 35/14
2m = 5/2
m = 5/4
m = 1.25
So the value of "m" is 1.25
It is not.
6/12≠1/12
Say you where having a party and brought 2 one dozen boxes of cupcakes. After the party was over, you look in the first box and find 6 of the twelve cupcakes left. You look in the second box and find 1 of the twelve cupcakes left. The number of cupcakes left in each box isn't the same. The two fractions aren't equivalent.
Here, = x(-y + z)
Just substitute the values,
= 3( -3 + 1)
= 3( - 2)
= -6
In short, Your Answer would be -6
Hope this helps!
the term relies on a product, meaning is a geometric sequence, and the product relies on a term's ordinal value to be plugged in, namely n = 7, you simply get the term by 
, when all it needs is the ordinal value to be plugged in, is called an explicit formula.
