exam Maths Puzzle Numerical Ability

1. The inventor of a new product believes that the cost of producing the product is given by the function
C(x)= 1.75x + 7000

How much does it cost to produce 2000 units of her

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exam Other Question

Can you please help?
Solve the system by substitution or elimination
a)....2/x+3/y=16
-1/x+2/y=6

b)....solve for x
|x...3..|
|2...x+1| }all = DET 16

c)...x^2+y^2=7
find the GCF for 14 and 21