Why is the quotient of two negative integers positive?

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

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

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?