Answer:
-2/15
Step-by-step explanation:
Make them same denominator, which is 15.
1/5=3/15
1/3=5/15
then subtract, and you get -2/15
Question:
Solve for x:
. Fill in both values for x below. Write the greater value for x in the first column.
Answer:
and
are the values for x.
Explanation:
The equation is 
Subtracting both sides by 7,

Dividing both sides by 12,

Now, we shall write the equation by removing modulus by adding plus and minus on the other side of the equation.
or 
Solving the equation
, we get,
or 
Thus, the solutions are
and 
Answer:
Step-by-step explanation:
I will show you by example. For the sin ratio, we have that the sin of the reference angle is equal to the side opposite the angle over the hypotenuse of the right triangle. We use this example for finding the ratio, knowing the angle:
found on your calculator. Because this is a special angle in a right triangle, we can also say, by looking at a 60 degree reference angle that the side across from the angle measures square root of 3, and the hypotenuse measures 2. So in terms of a radical,

If we don't know the angle, we use the 2nd button on our calculator to find it. For example, if our problem looked like this:
,
we are asked what angle has a sin ratio of 1/2. We find this angle by pressing the 2nd button on our calculator, then the sin button and you will see this on your screen:

Enter either a .5 or a 1/2 after that open parenthesis and hit enter and you'll get the angle measure. That's how you use the inverses to solve for missing angles.
2 numbers are 0.45 and 0.4. 0.4 would equal 2/5 in simplest form. 0.45 in simplest form is 9/20. hope this helps.