Simplify the expressions by combining like terms.
30) 4x + 3-x =
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For the function, f(x) = -5x 2, find f(-4).

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.