1pt
choose two of the following choices that can represent the nth term of the sequence: 54, 18, 6, 2,

a_n=162\cdot3^n\ ,\ \ n\ge1
a
n

=162⋅3
n
, n≥1

a_n=54\cdot3^{n-1}\ ,\ \ n\ge1
a
n

=54⋅3
n−1
, n≥1

a_n=54\cdot\frac{1}{3}^{n-1}\ ,\ \ n\ge1
a
n

=54⋅
3
1


n−1
, n≥1

a_n=54\cdot3^n\ ,\ \ n\ge1
a
n

=54⋅3
n
, n≥1

a_n=162\cdot\frac{1}{3}^n\ ,\ \ n\ge1
a
n

=162⋅
3
1


n
, n≥1

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?

Two numbers have a sum of -19. one number is x. what expression represents the other number?