exam Maths Puzzle Numerical Ability

Show this problem as the following properties.
6 * (5 + 4)

(a) Distributive property
(b) Commutative property of addition
(c) Commutative property of multiplication

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exam Other Question

if f(x) = 5x to the 2power-3x+1,find f(-2) Jonathan has 136 coins in this collection of dimes and quarters. If the coins have a total value of 528, how many are dimes and how many are quarters?