The operation*is defined over the set of ordered pairs by(a, b)*(c, d) . Determine whether or not this operation is commutative, find the identity element for*. Given that the inverse of (a, b) is (c, d)find an expression for c and d in terms of a and b. hence find the inverse of (2,1)​

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

What is fraction that is equivalent to 3/8