Nel trapezio \( A B C D \) gli angoli \( \widehat{A} \) e \( \widehat{B} \) adiacenti alla base maggiore misurano rispettivamente \( 68^{\circ} \) e \( 28^{\circ} \) e la diagonale \( A C \) è bisettrice dell'angolo \( \widehat{A} \). Calcola l'am- piezza degli angoli di ciascuno dei triangoli in cui il tra- pezio dato risulta diviso dalla diagonale \( A C \). La base minore \( D C \) è congruente al lato obliquo \( A D \). Perché?

solve by sobsitution : \( x-y=3 \) \( 3 x+6 x=-9 \)

197 Лена полола первую грядку \( \frac{1}{3} \) ч, вторую на \( \frac{1}{5} \) ч меньше, а третью на \( \frac{2}{15} \) ч больше, чем первую и вторую вместе. Сколько времени ушло у Лены на про- полку?

In which of the following circumstances is a twelve-year-old most likely to need supervision? a. When practicing guitar b. When playing a board game c. when learning to dive into a pool d. when watching sports on television

Solve for \( y \), \[ 2 y+3 \mid-14=-14 \] If there is more than one solution, separate them with commas. If there is no solution, click on vo solotion", \( y=\square \)

The movement of the progress bar may be uneven because questions can be worth more orless Divide: \( \frac{20 m^{2} n^{3}-10 m^{2} n}{5 m n} \) \( 4 m n^{2}-10 m^{2} n \) \( 15 m n^{2}-5 m \) \( 4 m n^{2}-2 m \) \( 4 m^{3} n^{4}-2 m^{3} n^{2} \)