2 times x minus 5 is 7. What is x?
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The domain and the range of a function are the possible input and output values, the function can take.
<em>The domain and range of Tanya's savings is [0,10) and [0,245], respectively.</em>
Let:
So, the equation is:
The domain is the number of weeks she used to save.
When (i.e. the total savings), we have:
Solve for x
Approximate
<em>Hence, the domain of the function is: [0, 10)</em>
The range is the minimum and maximum amount she can save.
<em>Before she starts to save, she has $0.</em>
<em>At the end of the 10th week, she has $245.</em>
Hence, the range of the function is [0,245]
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