hardwick744

25.07.2020 • 

Mathematics

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.

Ответ:

bubl6010

04.11.2022

Mathematics

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Step-by-step explanation:

Let x represent the larger number.

Let y represent the smaller number.

The larger number is equal to twice a smaller number plus 3. This is expressed as

x = 2y + 3

x - 2y = 3 - - - - - - - - - - - - -1

The same number is equal to twice the sum of the smaller number and 1. This is expressed as

x = 2(y + 1)

x = 2y + 2

x - 2y = 2- - - - - - - - - - - - - - 2

Subtracting equation 2 from equation 1, it becomes

0 = 1

Therefore, no solutions exist because the situation describes two lines that have the same slope and different y-intercepts.

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