(x – 10) + (3x – 6) =
please someone help?

The step function g(x) is defined as shown. what is the range of g(x)? ***answer choices in picture.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints