What is the rule for the sequence with the first four terms below? 3/16, 3/64,3/256,3/1024 !

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

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125