What is the factored form of the expression?
4x2 – 81y2
a. (2x + 9)(2x – 9)
b. (2x + 9y)(2x – 9y)
c. (2x + 9y)2
d. (2x – 9y)2
factor the polynomial.
54c3d4 + 9c4d2
a. 9c3d2(d2 + 6c)
b. 9c3d2(6d2 +
c.
c. 9c4d2(d2 + 6)
d. 9c4d2(6d2 + 1)

Monkeys and bats have similar bone structure in their forelimbs. however, monkeys have longer forelimbs to use for climbing and swinging in trees. bats have shorter forelimbs to use for flight. which term best describes how monkey and bat forelimbs are related to each other? a. homologous b. embryonic c. analogous d. vestigial

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.