Martha types a 4−digit code into a keypad to unlock her car doors. the code uses the numbers 1 and 0. if the digits are selected at random, what is the probability of getting a code with exactly one 1? enter your answer as a simplified fraction.

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Atransformation t : (x, y) (x-5,y +3) the image of a(2,-1) is