What is the closed linear form for this sequence given a1 = 0.3 and
an+ 1 = an + 0.75?
a) an = 0.45 - 0.75n
b) an = 0.45 + 0.50n
c) an = -0.45 + 0.75n
d) an = -0.45 - 0.75n

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?