Answer:
Dave bought the clock for $300. Each year the value of the clock increased by $50.
Step-by-step explanation:
81k^2 - m^2 factors to
(9k + m)(9k - m)
Prove this by FOILing.
First - 81k^2
Outer - (-9km)
Inner - 9km
Last - (-m^2)
Put it into equation form
81k^2 - 9km + 9km - m^2
And combine terms to get the original equation,
81k^2 - m^2.
⭐ Answered by Hyperrspace (Ace) ⭐
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Answer:
1
Step-by-step explanation:
1/15 + 7/30y + 1/2y = 4/5
2 + 7y + 15y = 24
2 + 22y = 24
22y = 24 - 2
22y = 22
