2. In the following diagram which is not drawn to scale, why can't both AB and AC be perpendicular to BC ?

if they are both perpendicular to BC, then they must be parallel. Since they meet at a point, then they are not parallel and hence cannot be perpendicular to BC

Step-by-step explanation:

If the two lines are perpendicular to BC, then the two lines would be parallel.

From the definition of parallel lines, we know that they are lines which travel in the same direction but do not meet.

But in this question, we can see that the lines met already at point A. That means both lines cannot be parallel and this equate to the point that they are both not parallel to the line BC

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you