There are 276 nickels. How many whole dollars can be made from this and how many nickels are left over?

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.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"