What is the coefficient of the second term of the polynomial? (In other words, what is B?) (x + 2)(2x2 + x − 1) = 2x3 + Bx2 + x − 2

In the blank, write what B equals. Use only numbers - no letters or spaces.

Asilkworm winds its cocoon out of one long silk fiber. to make silk thread, 3 to 10 of these silk fibers are unwound from their cocoons and combined into aa single thread with a typical length of 300 yards. choose a reasonable number of silk fibers in a thread write an equation to find the total length of the silk fibersused in 300 yards of the thread

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

Ill mark the brainliest if you me with the these three questions 7,8,9