Which of the following correctly represents the movement on the number line for the calculation 21 - (- 15) + (- 30) ?

What percent of 18 is 24? and plz explain thx.

Amayoral candidate would like to know her residents’ views on a tax on sugar drinks before the mayoral debates. she asks one thousand registered voters from both parties. these voters are an example of a census population convenience sample simple random sample

There are two triangles. one has a base of 8cm and the height of 10 cm the other has a base of 5cm and a height of 13cm which triangle has a larger area