When all the variables cancel out in an equation, how do you know if there are no solutions or infinite solutions?

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

What is 1.5% of 120 or what number is 1.5% of 120