Expand and simplify (3x+5)(4x-1)
show workings as this is revision for a test and i dont know how to work this kind of questions out.

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

The area of square garden is 300m squared. how long is the diagonal?

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.