Banyak siswa dalam satu kelas adalah 40 orang, diantaranya 15 siswa laki-laki. Tentukan perbandingan untuk banyak siswa perempuan dengan siswa laki-laki.​

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm