A letter is randomly selected from the world,,PROBABILITY,, what is the probability of getting a vowel letter

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?