Lily takes a train each day to work that averages 35 miles per hour . on her way home her train ride follows the same path and averages 45 miles per hour . if the total trip takes 2.5 hours , what equation can be used to find n, the number of miles lilly's homes is for work

49.2 miles

Step-by-step explanation:

The distance remains the same.                        d

The time spent on the outbound trip is t1 =

                                                                         35 mph

and that on the inbound (return) trip is

                                                                              d

                                                                t2 =

                                                                         45 mph

We combine these two fractions and set the sum = to 2.5 hours:

d(1/35 + 1/45) = 5/2

We wish to solve for d, the distance between home and work.

The LCD of 35, 45 and 2 is 630.

1/35 becomes 18/630; 1/45 becomes 14/630, and 5/2 becomes 1575/630.  Then we have the simpler equation   d(18 + 14) = 1575, or

d(32) = 1575, and d is then

d = 1575/32 = 49.2 miles

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two