Ancilla and christabel are two wives of David, Ancilla is older than christabel .Given that Ancilla's age is (5x-4) years and christabel's age is (2x+1)years. write down the expression interns of x for how much older Ancilla is than christabel​

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?