Simplify.

(3x^2 + 2x + 7x^3) + (10x^2 + 6x + 9)

a) 7x^3 + 13x^2 + 8x + 9

b) 7x^3 + 30x^2 + 12x + 9

c) 13x^3 + 8x + 16x^3

d) 13x^4 + 7x^3 + 8x^2 + 9

In the 30-60-90 triangle below side s has a length of and side r has a length

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83