Math questions please help

1) make a chart
amount invested rate interest earned
x 11% 0.11x
9500-x 8% 0.08(9500-x)
=937
0.11x+0.08(9500-x)=937
0.11x+760-0.08x=937
0.03x=177
x=5900
therefore 5900 was invested at 11% and 3600 at 8%

2) let f represent foreign tourists and 4f amercian tourists
f+4f= 7mill
5f= 7mill
f= 1400000
therefore the number of foreign tourists are 1400000 and american tourists are 5600000

3)A=90 P=12
idunno

4) LW=8, 2L=2W=12
L=4 W=2

5)c= pi*r2*h=80
pi*r2=75
r=4.9
23.8
idunno lol

goodluck with 6 and 7

8) 1050/5=210m/h
1050/7=150m/h

-_____- i should be doing my own math homework
sorry i dont know everything :P

Answer 1 is correct 1,2,3 and 4 only. The 5 to correct 2pirh=75 then r=2.13 and h=5.6. The 6 changing w to kg and h to cm and replacing in equation, s(wh)=1.59 The some form in 7, s(wh)=1.77
And 8: Va+Vv= D/t=1050/5 and Va- Vv=1050/7, resolving both I have Va=180miles/h and Vv=30miles/h
Good luck.

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i think the asnwer to Q2 is

5600000 americans and 140000 foreigners

Do your own homework jamie!