The price of an item yesterday was $135. today, the price rose to $324. find the percentage increase

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

What is the slope of the line shown below?

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.