Alex wants to buy a computer
priced at $640. If sales tax
is 8%, what is the total cost of
the computer?

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.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|