HELP ME PLZZ

a substance has a length of 4cm, its breadth is 2cm and its height is 5cm. this substance has a mass of 80g. Find its density.

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

Which statement about the relative areas of ? abc and ? xyz is true? the area of ? abc > the area of ? xyz the area of ? abc < the area of ? xyz the area of ? abc = the area of ? xyz more information is needed to compare.

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1