morgan has $28.75 on a gift card. she buys seven cups of coffee and has $20 left write and solve an equation to determine the co
1 answer:
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Answer:
Step-by-step explanation:
Given
f(x) =
Finding f(-1) means, we have to put -1 in the places of x in the function,
So, putting x=-1 in the function
As the power 3 is odd, the minus will remain the same, while in the 2nd term minus will be eliminated due to even power. So,
=>
=> 1
Hence,
