Use distributive property:
16. 5k(3 - 4k)
15k - 20k^2
18. 6g^2(g - 8)
6g^3 - 48g^2
20. -2n^2 (5n - 9 + 4n^2)
-10n^3 + 18n^2 - 8n^4
#1 7.1 years old
#2 7.8 years old
#3 87.4
#4 74
#5 7.4
its X < 1 or x > 3
where every the point goes is where the graph goes is what I do
Cross multiplication is applied here.
