10 p You do not need a calculator to find the exact value of
cos? (385°) + sin?(-25°). Find this value without the aid of a calculator
and explain how you did it so that a classmate would understand and be
able to reproduce your work.

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth

What is the area of the shaded sector?