exam Maths Puzzle Numerical Ability

Word problem:
There are 60 dimes and quarters in the drawer. Arny counted them and found that their total value was $8.70. How many coins of each type did Arny have?

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exam Other Question

Can you explain and figure it out for me of how to graph an equation in the form of y=mx+b.I need to know how to do this later.

y=2x-3 Let f(x)=x^3-8x^2+17x-9. Use the factor theorem to find other solutions to f(x)-f(1)=0, besides x=1.