![subject](/tpl/images/cats/mat.png)
Mathematics, 22.05.2020 02:04 janyak048janyak048
Mark is solving the following system.
Step 1: He multiplies equation (1) by 7 and adds it to equation (3).
Step 2: He multiplies equation (3) by 2 and adds it to equation (2).
Which statement explains Mark’s mistake?
He added equation (3) instead of equation (2) in step 1.
He did not multiply equation (3) by the same number as equation (1).
He did not eliminate the same variables in steps 1 and 2.
He added equation the equations in step instead of subtracting them.
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 13:30
At dinner, 2/5 of the people had fish and 1/3 had chicken. if everyone else had lamb, what fraction of the people had lamb? and if 40 people had lamb , calculate the total number of people at the dinner.
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 16:30
Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²
Answers: 3
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:30
How can you find the mean absolute deviation (mad) for this set of data?
Answers: 3
You know the right answer?
Mark is solving the following system.
Step 1: He multiplies equation (1) by 7 and adds it to...
Step 1: He multiplies equation (1) by 7 and adds it to...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.05.2021 15:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 07.05.2021 15:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 07.05.2021 15:50
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 07.05.2021 15:50
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.05.2021 15:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/es.png)
Spanish, 07.05.2021 15:50
![question](/tpl/images/cats/mat.png)
Mathematics, 07.05.2021 15:50
![question](/tpl/images/cats/mat.png)
Mathematics, 07.05.2021 15:50
![question](/tpl/images/cats/mat.png)
Mathematics, 07.05.2021 15:50