A coin purse contains d dimes and q quarter's. There are 20 coins in the purse and the total value of the coins is $4.25. Which coin system of equations represent this situation? A. d+q=4.25, 0.1d+0.25q=20. B. d+q=20, 0.1d+0.25q=4.25. c. d+q=20, d+q=4.25

Which type of basaltic lava flow has a fairly smooth

Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions