When dealing with percentages it is often much easier to convert it to a decimal (mostly because a lot of people are uncomfortable working with fractions) but in this case, I suggest dividing 1 into 5 [hint hint fractions are just glorified division in the long run] and after you have done that multiply by 100. This will get you your answer.
120/143. 12 x 10 is 120, and 13 x 11 is 143. It is already in simplest form.
Well the problem came out kind of weird but the prime factors of 28 are 2•2•7
Hope this helps!
Answer:
5 nights
Step-by-step explanation:
Solve the inequality:
90x + 90(0.1)x + 12x + 30 
600
Add like terms:
102x + 30 + 90(0.1)x 600
Isolate the variables:
102x + 90(0.1)x 570
102x + 9x 570
111x 570
x 5.13
So, the Lincolns can stay for 5 nights without exceeding $600
