David has 18 coins in nickels, dimes and quarters the total value is $2.80 the number of nickels is one more than three times the number of dimes how many quarters does David have

Pleting the square f the given find the x-intercepts of the parabola with vertex (-5,13) and y-intercept (0, 12). write your answer in this form: (14,.99). if necessary, round to the nearest hundredth. *- h enter the correct answer, de verter, and ametry 00000 done doo