exam Maths Puzzle Numerical Ability

Use a special product to multiply.
7(3a + 2.2) (3a - 2.2)

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exam Other Question

A real estate agent received a 2% commission on the sale of a home. If the home sold for $761,000, how much was her commission?

i come up with .2X761,000 = $15220.00 am i heading in the right direction. A=2LW+2LH+2WH for H