Which of the equations are true identities? A. (a + b)(2a + 1) = a(2a + 2b + 1)

B. (n + 2)2 – n2 = 4(n + 1)

answer:

sometimes

*i think

answer:

step-by-step explanation:

here, the total dishes = 10

dishes having meat = 3 ( chicken, meatloaf and hamburger )

thus, the probability of having meat on the chosen dishes = number of dishes having meat / total dishes

=

therefore, the probability of not having meat = 1- the probability of having meat on the chosen dishes

=

=

=

⇒ option b is correct.

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734