Answer two questions about Systems AAA and BBB: System AAA \text{\quad}start text, end text System BBB \begin{cases}x-7y=-34x+y=7\end{case s} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ x−7y=−3 4x+y=7 \begin{cases}4x+y=7x-7y=-3\end{case s} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ 4x+y=7 x−7y=−3 1) How can we get System BBB from System AAA?

Suppose a least-squares regression line is given by modifyingabove y with caret equals 4.302 x minus 3.293. what is the mean value of the response variable if xequals20?

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.