What is the slope of the line shown below?

A. -3
B.-6
C.6
D. 3

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Identify the number as a regional or irrational.explain. 291.87

If y varies as x, and y=8 as x=4 what will be the value of y if x=2