Write a situation that could be represented by the algebraic expression below:
2a + 3b

What is a graph with a never ending line called?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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