A computer repair shop charges a $25 fee in addition to $40 per hour to service a computer.
Write an equation to represent the total cost to
service a computer. Identify your variables.

a) What is the rate of change
b) What is the initial value
c) What is the independent variable
d) What is the dependent variable

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.