Which of the following polynomial equations are valid identities?

a. (a + b) (2a + 1) = a (2a + 2b + 1)

b. (n+2) 2 - n2 = 4 (n+1)

only a?

Only b?

Both?

Neither?

and explain why

mrs. Robbins read 6 nights in a row. she read between 13 and 42 pages but never read the same number of pages. what could the number of pages mrs. Robbins read in 6 nights

In a sample of 30 coin flips, heads came up 6 times. What is the sample proportion for heads? A. 0.6 B. 0.5 C. 0.1 D. 0.2

12 divided by 0.2 without a calculator

suppose your state lottery has an expected value of - 31%. If you spend $25 per month on lottery tickets, how much money would you be expected to lose in an average year

a red ball and 4 white ball are in a box if two balls are drawn without replacement, what is the probability of getting a red ball on the first drawn and a white ball on the second

Substitute x=5 and y = 7 for the algebraic expression 24x-3) + 6 (3y-5) and evaluate the expression

In a region there is a. 95 probability chance that a randomly-selected person of the population has brown eyes assume 12 people are randomly selected

4b - 5 = - t, solve for b

morgans gross income was 1200. How much Federal Income Tax will she pay if Federal Income Tax 12%. Round to the nearest hundredth

The difference 25 (d-10) - 23 (d+6) 25 (d-10) - 23 (d+6) is