suatu kelas yang berjumlah 25 siswa, terdapat 20 siswa yg senang sepak bola, 15 siswa senang bulutangkis dan 3 siswa tidak senang keduanya. banyaknya siswa yg senang keduanya adalah?

Browning labs is testing a new growth inhibitor for a certain type of bacteria. the bacteria naturally grows exponentially each hour at a rate of 6.2%. the researchers know that the inhibitor will make the growth rate of the bacteria less than or equal to its natural growth rate. the sample currently contains 100 bacteria.the container holding the sample can hold only 300 bacteria, after which the sample will no longer grow. however, the researchers are increasing the size of the container at a constant rate allowing the container to hold 100 more bacteria each hour. they would like to determine the possible number of bacteria in the container over time.create a system of inequalities to model the situation above, and use it to determine how many of the solutions are viable.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter