Quick computings cost function will take the form of a quadratic function c(x)=0.5x^2-10x+100. find the quick computings cost of producing 25 calculators by substituting x=25 into the cost function

Sum is 17 and their difference is 3

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

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?