as atherosclerosis is the commonest cause of arteriosclerosis the two terms are often used interchangeably arteriosclerotic heart disease ashd also called coronary artery disease cad or coronary heart disease chd refers to arteriosclerosis of heart or coronary arteries
Home-Education Resources. Algebra. Algebra is a way of expressing mathematical equations using numbers, and letters and symbols called variables. For example, the equation below is used to show that the speed that something travels multiplied by the time that it travels will result in the distance traveled.ome-Education Resources. Algebra. Algebra is a way of expressing mathematical equations using numbers, and letters and symbols called variables. For example, the equation below is used to show that the speed that something travels multiplied by the time that it travels will result in the distance traveled.
The letters R,Q,N,Z are the names of the set of the numbers, that have specific properties. For instance, N is the letter which designates the set of natural numbers. N = {0 , 1 , 2 , 3 ,............. If the set is N^*, that means that the 0 value does not belong to the set. We could also write as: N^* = N - {0} The letter Z designates the set of integer numbers, which contains positive and negative elements. Z = {... , -n ,.... ,-4 ,-3 ,-2 ,-1 ,0 ,1 ,2 ,3 ,4 ,... ,n, .....} So, the set Z is composed from the elements of N and their opposed. The conclusion would be that N is a subset of Z. Also Z^* = Z-{0}. The letter Q designates the set of rational numbers. The set could be mathematically described as: Q = {m/n / m and n belong to Z, m is not divided by m}.