Review the graph of a parabola. On a coordinate plane, a parabola opens to the right. It goes through (3, 0), has a vertex at (negative 2, negative 3), and goes through (0, negative 5).

Which equation represents the curve shown?

2(x + 2) = (y + 3)2
2(y + 2) = (x + 3)2
–2(y + 2) = (x + 3)2
–2(x + 2) = (y + 3)2

Pokój na planie w skali 1: 100 jest prostokątem i ma wymiary 5,2cmx4,4cm. jaką powierzchnię w m2 ma pokój? ile m bieżących wykładziny dywanowej o szerokości 5m trzeba kupić by wyłożyć cały pokój jednym kawałkiem przy minimalnych stratach ? ile zapłacimy za wykładzinę jeśli 1m2 kosztuje 30 zł ?

What is the length of the unknown leg in the right triangle ?

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.