write a function g whose graph represents a vertical shrink by the factor of 1/2 of the graph f (x)=2x + 6

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Tom drove 206 miles in 3.9 hours. estimate his average speed.