In total school choir has 80 students, with 36 of them being in seventh grade. also, 40 students in the choir are girls where 18 of them are in seventh grade. what is the probability that a student picked at random from the choir is either a girl or is in seventh grade?

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9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.