exam Maths Puzzle Numerical Ability

Write an exponential function of the form y=ab^x whose graph passes through the given points.

17. (1,4),(2,12)

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exam Other Question

6x+2y=7
y=2-3x
solve by substitution or another method Carol has 18 coins with a total value of $3.45. If the coins are dimes and quaters, how many of each kind are there?