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
Baileys rectangular dog pen for his Irish setter must have an area of 300 square feet. Also, the length must be 10 feet longer t
1 answer:
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