Answer:
It will take her 13 hours
21.5.......:::..............:.::.::..
-7x-5y=-47x+9y=-4
combine like terms to cross out the 7x
solve for y, to get -2
plug it back in to one of the equations and x is 2
y=-2
x=2
Answer:
I think it is A
Step-by-step explanation:
Answer:
Step-by-step explanation:
(a) Use the GaussPivotLarge function to solve the system of linear equations in Eq. (4.17).
(b) Use the GaussPivotLarge function to solve the system:
(See the last attachment)