Tempat duduk disebuah gedung teater diatur mulai dari baris depan ke belakang dengan
banyak baris dibelakang 2 kursi lebih banyak
dari baris didepannya. Jika dalam gedung
teater tersebut terdapat 15 baris kursi dan baris
ke-8 ada 10 kursi. Tentukan jumlah kursi
dalam gedung tersebut !

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

In the diagram of circle a what is m

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)