Hi

I need help on these problems, these are practice problems for my final because the questions will be similar to these but I need help with these.

I am lost.

Any help would be greatly appreciated

1) find average speed if you drive 100 miles half the trip at 60mph nd half

30mph?

and then

Driving 30 minutes @ 45mph and 30 minutes @15mph

2) of a collection of mango fruits the king took 1/6 the queen 1/5 of the

raineder the three chief princes 1/4,1/3 and 1/2 of the successive remainders

and the youngest child took the reamaining 3 mangoes o you who are clever in

miscellaneous problems on fractions give out the measure of the collection of

mangoes???

3) I NEED TO SOLVE THIS PROBLEM BACKWARD BUT I DONT KNOW

i began the day feeling very rich as i was walking to school i met a friend who

had loaned me money and thought this would be a great opportunity to pay her

back so i gave her $15 theni remembered i nedd to buy some school supplies and

that took one third of the money in my pocket then i met another friend and she

asked me for a loan so i gave her three fourths of the money in my pocket now i

had only $10.00 in my pocket how much money didi i start with??

ANY HELP WOULD BE GREATLY APPRECIATED, THANKS IN ADVANCE