![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 15.07.2020 03:01, nicolasjarrin
Selena and Drake are evaluating the expression (StartFraction r s Superscript negative 2 Baseline Over r squared s Superscript negative 3 Baseline EndFraction) Superscript negative 1, when r = negative 1 and s = negative 2. Selena’s Work Drake’s Work (StartFraction r s Superscript negative 2 Baseline Over r squared s Superscript negative 3 Baseline EndFraction) Superscript negative 1 Baseline = (r Superscript negative 1 Baseline s) Superscript negative 1 Baseline = StartFraction r Over s EndFraction = StartFraction negative 1 Over negative 2 EndFraction = one-half (StartFraction (negative 1) (negative 2) Superscript negative 2 Baseline Over (negative 1) squared (negative 2) Superscript negative 3 EndFraction) Superscript negative 1 = (StartFraction (negative 1) (negative 2) cubed Over (negative 1) squared (negative 2) squared EndFraction) Superscript negative 1 = (StartFraction negative 8 Over 4 Endfraction) Superscript negative 1 Baseline = StartFraction 4 Over negative 8 EndFraction = negative one-half Who is correct and why? Selena is incorrect because she should have substituted the values for the variables first, and then simplifed. Selena is correct because she simplified correctly and then evaluated correctly after substituting the values for the variables. Drake is incorrect because he should have simplified first, before substituting the values for the variables. Drake is correct because he substituted the values for the variables first, and simplified correctly.
![answer](/tpl/images/cats/otvet.png)
Answers: 2
Other questions on the subject: Mathematics
![image](/tpl/images/cats/mat.png)
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:40, kevon9008
Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236
Answers: 1
![image](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 01:00, fendyli6066
Find the value of the variable and the length of each chord for #5 and #6.
Answers: 1
Do you know the correct answer?
Selena and Drake are evaluating the expression (StartFraction r s Superscript negative 2 Baseline Ov...
Questions in other subjects:
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/en.png)
English, 19.05.2020 03:22
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.05.2020 03:22
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.05.2020 03:22
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.05.2020 03:22
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.05.2020 03:22
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.05.2020 03:22