A bird flies 20 feet above the water and drops a pebble that sinks down to 15 feet below the surface. How far does the pebble fall? Using a subtraction equation, explain your answer.
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In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

Which number completes the inequality? 2/3 < _ < 7/9