There are 75 silver beads and 15 gold beads in each package of beads. what is the unit rate in silver beads per gold bead? 5 10 15 75

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 measure of an angle is 117°. what is the measure of a supplementary angle?

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