Annika biked 37 km this morning and another xkm in the evening

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.