Nine less than twice a number is thirty one

Step-by-step explanation:

Less than- you had to subtract by the minus sign.

First you had to translate words into an equation.

2x-9=31

Then you solve by equation and add by nine from both sides of equation form.

Next, you divide by two from both sides of equation form.

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-Charlie

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,