PLZ HELP!! 1. Identify the following situation or equations as proportional or non-proportional and explain your reasoning.

The total cost of rent is determined by recording x months of rent at $1400 per month, plus a $150 application fee.

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

Whoever gets this right gets the ! the half life of a soul smelling substance is 4 years. if you have 8 oz of this strange substance, how much of it will you have after 20 years? show work.

Convert the density of surface sea water to metric tons/cubic meter