Trudy wants to multiply 66 x 606. She says that all she has to do is find 6 x 606 and then double that number . Explain why Trud
1 answer:
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Repeated multiplication
Power
If multiplying something with like bases, add the exponents together.
Answer:
a = 15
Step-by-step explanation:
Substitute b = 12 , a = 9 into the equation
12 =
12 = ← square both sides
144 = a² - 81 ( add 81 to both sides )
225 = a² ( take square root of both sides )
± = a , then
a = ± 15
a > 0 , so a = 15