For the following system, use the second equation to make a substation for y in the first equation. 2x+y=6 y=3x+4. what is the resulting equation?

Acone with volume 1350 m³ is dilated by a scale factor of 1/3. what is the volume of the resulting cone? enter your answer in the box. m³

What is the lcm of 16 and 40 ? 24 and 40 ?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?