X+3y=0 9y=-3x how many solutions does this system have

Bring the fraction a/a-4 to a denominator of 16-a^2

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?