exam Maths Puzzle Numerical Ability

A jar contains 40 coins consisting of dimes and quarters and having a total value of $4.90. How many of each kind of coin are there?

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exam Other Question

A-5 On an oblique triangle solve a=96in., b=58 in., B=30 degrees.
I know the answer is A=55.9 degrees, C=94.1 degrees, c=116 in, but I cannot get it to come out right. I sure would appreciate help. THANKS I need to determine the domain of the function {{{g(x)=5/x^2+4x }}}