X2-8x+21 make the expression (x-h) 2+k is equivalent

Which is the quadratic variation equation for the relationship? y varies directly with x2 and y = 72 when x = 6. A. y = 12x B. y = 4x2 C. y = x2 + 25 D. y = 2x2

Each of Mrs. White's two children received $50 for their savings account. The original amounts in their savings accounts were $500 and $300, respectively. Without calculating, which savings account had a greater percent of increase? Explain.

Mr. Abraham is 36 years old. His wife is 6 years younger than him and their son is 24 years old younger than his wife. What is the ratio of Mr. Abraham's age to his wife's age to his son's age? Write your answer in simplest form.

In a group 120 children there are teice as many boys as girls. How many girls are there?

If f (x) = 9x^2-11x+4, what is f (-3)

Nine less than four times a number equals fifteen

Its 30 pages because if you divide 493 by 16 it equals 30 pages

If z=5 and x = 6 what is z (z (z) x)) - 9

Sid wrote 541,309 on his paper. Using words and numbers explain how the number would change if he switched the digits in the hundred thousands and tens place

A batch of 330 samples of rejuvenated mitochondria contains 6 that are mutated (or defective). Two are selected from the batch, at random, without replacement.