Find a.​ (f+g​)(x​) b.​ (f+g​)(9​). f​(x​)
=3x2−x−4​, g​(x​)
=x−5
a. ​(
f+g​)(x​)
=
nothing
​(Simplify your​ answer.)
b. ​(
f+g​)(
9​)
=
nothing

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

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