Solve each system of equation by substitution y=-x+5 x+2y=2

Step-by-step explanation:

Given :

...................... equation 1

........................ equation 2

solving the system of linear equation by substitution method , substitute equation 1 into equation 2 , that is

collect the like terms

therefore :

substitute into equation 1 to find the value of y , that is

Therefore :

450

step-by-step explanation:

you get texts and minutes, so why not

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).