Anna bought three shirts for $23, $20, and $16 and a sweater for $28. the sales-tax rate is 4 percent. how much did she pay all together?

Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.

Is the square root of 4 plus the square root of 16 rational?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?