Help please me will mark

The third option, add 2 negative x tiles to both sides

Step-by-step explanation:

You want to put all x on one side, all numbers on the other. The best way to move the 2x on the right side so there are just numbers on the right hand side is to add two negative x tiles to both sides, which cancels out the 2x on the right, and leaves one x on the left.

18a

step-by-step explanation:

simply because it is. it's the highest common factor

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,