Question 4 (1) Draw two more arrangements with dots to form the sequence: 1; 3; 6; 10; 15; ... (i) How many dots will there be in the 6th and 7th arrangements? Explain how you got your (4) answer.​

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

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.

Someone me! if you’re smart you can solve this!