At the beginning of 1990, oil prices were $30 a barrel. Some oil investors predicted that the price of oil would increase by $5 a barrel per year. In the beginning of 2005, the price of oil was $20 a barrel. With increasing demand for oil around the world, oil investors in 2005 predicted that the price of oil would increase by $2.25 a barrel each year.

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

it is true

step-by-step explanation:

all the combinations add up i used   calculator

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5