Can someone please help me?!

What is the area of triangle abc if a = 8, b = 11, and c = 15?

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?