exam Maths Puzzle Numerical Ability

simplify completely. 5w^2/3rs/20wr/s^2.. i got ws/12r^2 .. is that correct

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exam Other Question

please help. complete the table of values for each equation
y=3x-7

x column y column
-2
-1
0
1
2
Thanks in advance for the help. I am trying to solve problem 10 on page 419. I do not understand how to find the base, when the area is already given in a triangle