Which trinomials are perfect square trinomials?

select each correct answer.

a^2+4a+16

a^2+15a+75

a^2+14a+49

a^2+26a+169

which expressions are differences of squares?

select each correct answer.

a^2−36

x^2+25

w^2−121

n^2−50

Timed***how else can the sequence for row 1 be written? notice: square a: 1 penny = 20 square b: 2 pennies = 21 square c: 4 pennies = 22 the sequence formed is geometric, with a1 = , and common ratio r = .

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Which of the following is the correct ratio for converting kilograms to grams