Your mother gave you $20 with which to buy a present. This covered 2/3 of the cost. How much did the present cost?

$30

Step-by-step explanation:

20 divided by (2/3) is 30.

answer: a.   one is a factor of every whole number since every number is divisible by itself.

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)