sarah bought t-shirts and hats on sale. the t-shirts cost $12 each, and the hats cost $9 each. she bought 4 more t-shirts than hats. if she spent a total of $111, how many t-shirts and hats did she buy?

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction