Christina estimates that she will spend $250 on new summer clothes. she actually spent $350. what is the percent error ? round to the nearest whole percent .

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me