Miss Velma bought 250 metres of cloth. She used 45% of the cloth to make some shirt. How much cloth does she have left ? Can you help me?

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.

I'll give brainliest if you answer right : )

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form