Math Help?

Question

1) What is the correct procedure to simplify the expression.
2n(5n-3)+8n
2) The first term in a sequence is 2, The second term in this sequence is 5 Each term after that is found by adding two immediately preceding terms what is the fifth term in the sequence?
3) What Equation represents a line that passes through the points (6,-3) and (4,2)?
4) On a map of Illinois the land distance from Moline to Rockford is 12 Cm The actual ladn distance from Monline to Rockford is Appox 90 Miles The land distance from moline to chicago on this same map is 20cm Which of the following is closest to the actual land distance from Moline to chicago? 54 Mi, 98Mi, 150 Mi, or 270 Mi?

Thanks for all of your help:)

Answer 1

1)
2n(5n - 3) + 8n =
2n(5n - 3) + 2n(4n) =
2n(5n - 3 + 4n) =
2n(9n - 3)
2)
2, 5, 7, 12, (7 + 12)
3)
(y - y0) / (x - x0) = (y1 - y0) / x1 - x0)
Fill in the numbers:
(y - 2) / (x - 4) = (- 3 - 2) / (6 - 4)
4)
(x mi.) / (20 cm) ≈ (90 mi.) / (12 cm)