Which model is most similar to that of Aristarchus

The distance d that a car can travel in a certain amount of time t can be found by multiplying the rate of speed r by the travel time. if a car has already travel 4 miles, the formula for the total distance travel is d= rt + 4. which of the following gives the value of r, in terms of d and t?

2(4p+1)/5< = (3+12p)/4 its less than or equal solve it for me an with explanation plz

It's 90 °f in the shop with high humidity. what pressure will be shown on the high-side pressure gauge (ac system on)?             a.  10 to 50 psi    b.  40 to 140 psi  c.  210 to 290 psi  d.  at least 350 psi