Math (HELP PLEASE)
posted by Sabina .
1) An elevator goes down 7 floors, up 3 floors, up 6 floors, down 8 floors, up 1 floor, and down 6 floors. It is now on floor 3. Which floor did it start on?
2) Megan bought a book for $12.00, received an allowance of $15.00, paid back a loan of $7.00, bought lunch for $8.50,earned $8.00 raking leaves, and found $2.00. She now has $22.25. How much did she start with?
3) Miguel and Yoshi went rock climbing. Miguel climbed up 15m, back down 4m, climbed 6m,slid back 17m, climbed up 22m, rested and climbed 14m more. Yoshi climbed 12m, slid back 4m, rested, climbed up 33m and slid back 7m. They are now together at the 40m mark. At what level did each start climbing?
4) Shailini's plane leaves at 3:35 P.M. She has to check in 2 h before takeoff. She takes 1 h and 35 min to get to the airport from her home. Shailini must first drop off her dog, Fido, at her friend's house next door. She wants to spend 45 min talking to her friend.What is the latest time she should leave her house?

Setup equations
1) x  7 + 3 + 6  8 + 1  6 = 3
x + 10  21 = 3
x  11 = 3
x = 13
2) x  12.00 + 15.00  7.00  8.50 + 8.00
+ 2.00 = 22.25
You solve
3)
Miguel
x + 15  4 + 6  17 + 22 + 14 = 40
Yoshi
x + 12  4 + 33  7 = 40
You solve
4)
3:35plane
2:00less 2h
1:35checkin
1:35less to get to airport
12:00noon
00:45less 45 min talking
11:15leave house
Check for this
11:15leave house
00:4545 min talking
12:00time now
1:351 hr 35 min trip to airport
1:35time now at airport
2:002 hrs early for checkin
3:35time now
plane leaves 
I think in a question 2 the answer is 24.75. Correct?
What about a question 4. 3:35 is the latest time she should leave her house?
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