Option 1.
and option 4.
are equivalent to 
Step-by-step explanation:
Step 1:
The given expression is expanded as follows.
The -2 is multiplied with the 5x and then the -2 is multiplied with the
.
So the expression becomes as follows;

This is the first option given so the first expression is equivalent.
Step 2:

Of the other four options, only the fourth expression has the fraction
so the fourth expression is also equivalent.
Expressions 1 and 4 are equivalent to the given expression.
0.8 x 103 because the first number cant be less then 1 or more then 9 you would have to move the decimal to make the equation correct
722 sorry if I am wrong to me a while to work this out
X=-7
I'd be happy to help if you need an explanation:)