Answer + ! hassan writes an algebraic expression with four terms. the x-term has a coefficient of 2, and the z-term has a coefficient of -1. the expression has a constant term less than zero. which expression could he have written? a. 2x + z + 5 - 6z^2 b. 2x - z - 5 + 2z^2 c. -2x - z - 5 + 2z^2 d. -2x + z - 5 + 2z^2

We will write the expression step by step according to what the problem poses.
 We have then:
 The x-term has a coefficient of 2:
 
 the z-term has a coefficient of -1:
 
 The expression has a constant term less than zero:
 
 Then, the complete expression is:
 
 
 B. 2x - z - 5 + 2z ^ 2

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.