(6x7) = 47
(6x-7) = -42 -- This is because you are multiplying two differently signed numbers, the product will be negative.
Answer: 8,762.1 . The nearest tenth of a pound should be 2, the decimal throwing me off
Let the set of all Odd multiples of 9 between 2 and 82 be denoted by D, then, using set-builder notation,

The odd multiples of 9,
, in the range
form the set

Each member of the set is a term of the arithmetic progression

where the values of
range from 0 to 4, or 
Putting these facts together, we get the result

Learn more about set-builder notation here: brainly.com/question/17238769
I'm sorry I can't see it clearly.

As we know, sum of interior angles of a triangle is 180°
that is ~
Hence, value of x is 9°