Can anyone answer this question The roots of the quadratic equation z² + az + b = 0 are -7 + 2i and -7 - 2i. What is a+b

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

How does the graph of g(x)=⌊x⌋−3 differ from the graph of f(x)=⌊x⌋? the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted right 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted up 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted down 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted left 3 units.

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?