30 POINTS FOR THIS ONE (PLZ ANSWER AS A LIST)

1.

A term that has no variable factor is a(n) .

a)coefficient

b)constant

c)equation

d)like terms

2.

In an expression, have exactly the same variable factors.

a)coefficient

b)constant

c)equation

d)like terms

3.

A statement that two expressions are equal is a(n) .

a)coefficient

b)constant

c)equation

d)like terms

4.

When a term has a variable, the numerical factor is called the .

a)coefficient

b)constant

c)equation

d)like terms

Alogical argument that is presented in graphical form using boxes and arrows is called?

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.