Decrease 180 in the ratio 4:9​

4. find the geometric mean of 4 and 12. 24 8

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?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?