Answer:
0.9 represents the amount of the original price he is paying. i.e 0.9 of the original price equals the sales price
Step-by-step explanation:
x2 - 3(x + 7) > 15x
x2 - 3x - 21 > 15x
x = 100√3
tan(30º) = x/300
x = 300 tan(30º)
x = 300/√3
80
1.5808
rounded
hundreds
1.58
tens
1.6
first
2
53
2*19 =38
then by substituting 2x=38
then,
38+15=53
