What is the image of (12,-9) after a dilation by a scale factor of 1/3 centered at the origin

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

The experience c-0.25c can be used to find the cost of an item on sale for 25% off which expression beloit equivalent to c-0.25c

Line ab contains points a(4, 5) and b(9.7). what is the slope of ab?