exam Maths Puzzle Numerical Ability

can you please help me solve: (((Jim has a total of 50 coins. Some are nickels and some are dimes. Although he has $4.15. How many dimes does he have? How many nickels?)))

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exam Other Question

Kristen is shopping for a certain bike for her niece and knows that Toys-R-Us and Wal-Mart sell the bike for the same price. On December 26th, Toys-R-Us has the bike on sale for 37 Write the equation of the line with given slope and y-intercept. Then graph each line using
the slope and y-intercept.
Slope: -2; y-intercept: (0, 4)