Acertain number line uses 20 spaces between consecutive integers.

what is the distance between two consecutive tick marks? express answer in decimal form.

On a piece of paper graph f(x)=5•(0.4)^x

Find the equation using the point (4,8)

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.