Solve the following system of equations. 9x + 4y = 4 -5x + 7y = 7

The solution is:

Step-by-step explanation:

We have the following equations

To solve the system multiply by the second equation and add it to the first equation

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Now substitute the value of y in any of the two equations and solve for x

The solution is:

the answer is 24

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,