what is an interval estimate?
What will be an ideal response?
is a range of values constructed around a sample statics in order to estimate the population parameter
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Determine if the equations in the given pair are equivalent. Each equation has only one solution.7x = 72 - x and x = 9
A. Equivalent B. Not equivalent
Solve the problem.It has been found that the less income people have, the more likely they are to report that their health is fair or poor. The function 
models the percentage of Americans reporting fair or poor health, f(x), in terms of annual income, x, in thousands of dollars. According to the model, what annual income corresponds to 18% reporting fair or poor health? Round to the nearest thousand dollars.
A. approximately $21 thousand B. approximately $19 thousand C. approximately $23 thousand D. approximately $20 thousand
Remove parentheses and simplify.6x - (4 - 4x)
A. 6x - 8 B. 10x - 4 C. 2x - 4 D. 10x + 4
Solve the rational inequality. Express the solution in interval notation.
> 0
A. (-5, 2) ? (5, ?) B. (-?, -5) ? (5, ?) C. (-5, 2) ? (2, 5) D. (-?, -5) ? (2, 5)