Oswald wants to paint the ceiling of a square room The room is tour metres wide 50 millrlitres of...

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Oswald wants to paint the ceiling of a square room The room is tour metres wide 50 millrlitres of paint covers 5000 cm r of surface. How much paint will he need? wit Sylvia ran six times around a 400m race track in ten minutes. What is her average speed in metres per second?
wit Wine comes in 75d bottles. How many litres of wine are there in a crate of six bottles? ix) What is cheaper E4 for 10 metres of wire or Spence for 10 centimetres?

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Robert · Accepted Answer

A. Given that length of 4 boxes on the map represents 2 cm. 
Shipley and Boatwick are separated by 8 boxes that is, 4 cm on the map. 
Given, each cm on map corresponds to 6 miles in reality. 
Hence Shipley and boatwick are separated by 12 miles. 
B. Scale on map = 1:100 
1 cm 1 cm*100=100 cm 1 m 
2.5 cm 2.5 cm *100=250 cm 2.5 m 
0.8 cm 0.8 cm *100 =80 cm 0.8 m 
4.1 cm 4.1 cm*100=410 cm 4.1 m 
C. Scale on map = 1:250000 
On map (cm) Conversion value Real value (KM) 
1  250000 250  
10 2500000 2500 
4.6 1150000 1150 
0.2 50000 50 
D. Scale on map = 1: 5000000 
Real (KM) Conversion value On map (mm) 
50 50/5000000 10 
5 5/5000000 1 
100 100/5000000 20 
60 60/5000000 12
E.   
 
Scale= 1:50 
Width on map =10 mm 
Actual width = 500 mm = 0.5 m 
Length on map = 20 mm 
Actual length = 1000 mm = 1m 
 ii. Scale = 2cm/400 m=1:20000
C) Graphs
i. y=x+2 
 
 
ii. Y=2-x 
 
iii. y=2x-1 
 

iv. 3y=x 
 
v. y+x=-2 
 

D)  
i. y=x+3: y=3x-1 
Solution: (2, 5)
ii. x+y=1;  3y=x+11 
Solution : (-2,3)
iii. y=2x+3; y=x-1 
Solution: (-4, -5)
iv.   y=2x-2;  2y=x+8 
Solution: (4, 6)
E) Solve algebraically, 
 i. 9x-y=12; 4y-9x=6 
Sol:  
Adding the given two equations we get,

Oswald wants to paint the ceiling of a square room The room is tour metres wide 50 millrlitres of paint covers 5000 cm r of surface. How much paint will he need? wit Sylvia ran six times around a 400m...

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