Compare the expressions. Write < > or =.
9. -15 + 3 - 7
-9 - 1 + 16

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

Prove that quadrilateral is a rhombus.

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?