There are 30 students in a year 10 maths class. in the latest test the 21 girls in the class score a mean of 61%. in the same test the 9 boys in the class scored a mean of 78%. calculate the mean for the whole group of students.

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