What value of y satisfies the equation y/3 +1/4=5/12

Is the orthocenter of a triangle on the inside ?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

Simplify the algebraic expression 8y-2(y+4)