Diana is doing her math homework. Out of 24 problems Total ,she completes the first 12 problems in one hour in the last 12 problems in three hours. What is the unit rate for all 24 problems

6 problems per hour

Step-by-step explanation:

The first hour, she completed 12 problems, but for the last 12 it took her 3 hours.

                        Time Space 1:  1 hour for the first 12.

                         Time Space 2: 3 hours for the last 12.

Since we already know that there are 24 problems total, and 12 plus 12 equals  24; we can add the hours together ( 1 + 3 = 4 )

                            24 problems took 4 hours to complete.

            Divide the 24 problems by the 4 hours to get the basic unit of

                               6 problems per hour which is the answer

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

h * s * a

h = history teacher

s = science teacher

a =   art teacher.

i see no data table, but just multiply the number of history teachers, science teachers, and art teachers.