solve by matrix methode

A dietician works in a hospital and prepares meals under guidance of a physician. suppose for a particular patient, a physician prescribes a meal to have 750 calories, 40 g of protein, and 320 mg...

Sadly because I do not have a graphing calculator, I keep getting the values wrong in order to write the polynomial. The equation to follow this is P(x)=asub3x^3+asub2x^2+asub1^x+asub0...

Use row transformations to get the matrix into row echelon form.   Use a graphing calculator to get the matrix obtained from part (a) into reduced row echelon form.

Assume that the production of 1 unit of steel requires 0.8 units of steel and 0.2 units of lumber, and that the production of 1 unit of lumber requires 0.1 units of steel and 0.4 units of lumber. Find...

Four friends get together. One tells the truth all the time. One lies all the time. One tells the truth on odd-numbered days and lies on even-numbered days. One tells the truth on even-numbered...

Four new shows were planned for the upcoming fall season on WBC: a comedy, a drama, a variety show, and a news program. The names of the shows were Wall Street Blues, All in Favor, Murphy’s Law, and...

5x-4y=28 7x+5y=18