PLEASE HELP ASAP FO BRAILIEST!!

Step-by-step explanation:

9 x   = 1   Inverse Property

(-7 x 4) x 2 = -7 x (4 x 2)   Associative Property

-8 x 4 = -32 Closure Property

-7 x 1 = -7 Identity Property

6 x (-3) = (-3) x 6   Commutative Property

The Commutative Property states that the numbers on which we operate can be moved or swapped from their position without making any difference to the answer.

Identity Property for addition tells us that zero added to any number is the number itself.

The Closure Property states that when you perform an operation (such as addition, multiplication, etc.) on any two numbers in a set, the result of the computation is another number in the same set.

Distributive Property, is multiplying the sum of two or more addends by a number will give the same result as multiplying each addend individually by the number and then adding the products together.

Transitive Property, If a = b and b = c, then a = c

The Associative Property states that you can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis'. In other words, if you are adding or multiplying it does not matter where you put the parenthesis.

The additive Inverse Property is the opposite of the number. Any number plus its additive inverse equals 0.

a + (−a) = 0

The multiplicative Inverse Property is the reciprocal of the number. Any nonzero number multiplied by its reciprocal equals 1.

The Identity Property for addition tells us that zero added to any number is the number itself. Zero is called the "additive identity." The identity property for multiplication tells us that the number 1 multiplied times any number gives the number itself.

The Symmetric Property of equality tells us that both sides of an equal sign are equal no matter which side of the equal sign they are on.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b