Give three examples of systems of equations, one each that would be best solved using each of the three methods: graphing, substitution, and elimination.

Which is the best method to use to solve the following system of equations? A. Elimination B. Graphing C. Substitution D. None of the above 1 y = -x -3x + y = -5

The edges of a rectangular plece of plastic sheet are joined together to make a plastic tube. If the area of the plastic sheet is 284 cm", and the volume of the resulting tube is 134 cm³, what are the dimensions of the plastic sheet? Assume the sheet is longer than it is wide Determine the system of equations for this situation. Let x represent the width of the sheet, y represent the length of sheet. A represent the area of the sheet, and V represent the volume of the tube Assume that the width is used to form the circular base of the tube OA. A=xy v=mx² 4x OC. A-xy VaRx OB. A=xy v=Y²x² 4x OD. A=xy yx V=

Kelly Fisher has a total of $40,000 invested in two municipal bonds that have yields of 7% (bond A) and 9% (bond B) interest per year, respectively. If the interest Kelly receives from the bonds in a year is $3,440, how much did she invest in each bond? Formulate a system of equations that can be used to find the solution where x is the number of dollars invested in bond A and y is the number of dollars invested in bond B. (Do not perform any row operations.) = 40,000 = 3,440 Write the augmented matrix corresponding to the system. (Do not reorder the equations. Let the first column represent x and the second column represent y.) 40,000 3,440 Using the Gauss-Jordan elimination method, pivot the matrix about the first entry in the first row. State the result. $ $ 640 Continue using the Gauss-Jordan elimination method until the final matrix is in row-reduced form. State the solution. (x, y) = How much does she have invested in each bond? bond A bond B.