Taylor and Desmond ran laps after school to train for the football team. The ratio of the number of laps Taylor ran to the number of laps Desmond ran was 2:3. If Taylor ran 4 laps, how many laps did Desmond run?

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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.

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.