15. If a1 and a2 are the sum and product of roots of the quadratic equation 2(x+2)²+ c(x+1)=0, where c is a constant. Show that a1 +a2 = 0

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Which of the following best describes the figure?