Which situation is best modeled with a division expression?

a-finding the number of equal-sized parts into which a number can be split

b-finding the combined value of several different numbers

c-finding the distance between two numbers on a number line

d-finding the total value when several of the same number are grouped together

and joylin’s work to solve a math problem is shown below.

problem: manny walked 5/16 of the distance to the library in 1/3 of an hour. if he walks at a constant rate, what is the total amount of time he will spend walking to the library?

what was joylin’s first error?

a-she switched the divisor and the dividend when creating an equation to model the problem in step 1.
b-she replaced both the divisor and the dividend with their reciprocals when changing division to multiplication in step 2.
c-she multiplied the two numerators and the two denominators to generate her product in step 3.
d-she reduced the improper fraction incorrectly when getting her final answer.

1. a.Finding the number of equal- sized parts into which a number can be split

2.b. She replaced both the divisor and the dividened with their reciprocals when changing division to multiplication in step 2.

Step-by-step explanation:

1.

a.Finding the number of equal- sized parts into which a number can be split

It is a division expression because when we find the total number of equal sized number then we divide the number which is split by the number in which a number split.Hence, it is true.

b.Finding the combined value of several numbers

It is obtained by simply adding of several numbers . Therefore, it is not a expression. Hence, it is false.

c. Finding the distance between two numbers on a number line

It is obtained by simply by adding or subtracting of two numbers . Therefore, it is not a division expression. Hence, it is false.

d. Finding the total value when several of the same number are grouped together

It is obtained by simply adding of same number which are grouped together.Therefore, it is not a division expression. Hence, it is false.

2.Joylin' work to solve a math problem

Manny walked of the distance to the library in of an hour

Manny walks at a constant rate it means the speed remain same

Constant rate=

h=

h=

Hence, Joylin makes mistake in second step.

2.b. She replaced both the divisor and the dividened with their reciprocals when changing division to multiplication in step 2.