Answer:
-3
Step-by-step explanation:
You have get a graphing calculator and press y=.
Then you would type in the equation.
Then click second, graph after you type the equation.
Then scan through the t graph for the value that causes the equation to be 0
Answer:

Step-by-step explanation:
The given expresion is

when we expand this expression we get;

Now let us analyze the options:
First:

This is equivalent to the given expresion.
Second:

Also equivalent
Third:

Also equivalent
Fourth:

Not equivalent
So, what you need to is find the decimal or percent of them. So 13/20 is 65% or .65. You get that buy multiplying it by 5 to get the denominator of 100. A denominator can go up to 100. 13/20 is closer to 1 because 65% is closer to 100% than 0%. Next 3/10 is 30%. Do that by multiplying it by 10 to get the denominator of 100. 30% is closer to 0 than 100%. Subtract them. 1-0= 1. The answer is 1.