exam Maths Puzzle Numerical Ability

Homers change jar contains 40 coins consisting of dimes and quarters. If the total value is $4.90, how many dimes and quaters are there?

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exam Other Question

Could someone please explain how to factor the following equation:
3
8x +27
The 3 over the x is an exponent.
Thank You
1.15m+3=-6
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2 3. -7x+3=-15
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