Simplify each of the following by rationalizing the denominator.
please do answer my doubt

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

How many four digit even numbers can be formed from digits 1,2,3,4,5 if repetition is allowed. how can solve this using permutation formula