1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
natali 33 [55]
4 years ago
9

Describe and correct the error made in solving the system of equations by elimination

Mathematics
1 answer:
lesya692 [45]4 years ago
6 0
The mistake was when she multiplied the 2nd equation by 5, she forgot to also multiply that last number 10 by 5 as well.

correction :
5x + 3y - z = 15
-x + 2y + 3z = 10...multiply by 5
---------------------
5x + 3y - z = 15
-5x + 10y + 15z = 50 (result of multiplying by 5)
--------------------add
13y + 14z = 65

You might be interested in
A rectangle is 7 meters long.the perimeter of the rectangle is 24 meters what is the width of the rectangle.
shepuryov [24]
Width is 5 meters.
Hope this helped!
5 0
3 years ago
Read 2 more answers
There are 28 total students in Mr. Flynn’s class. The ratio of his students who are in the play to those who are not in the play
Vanyuwa [196]
About 18 students are in the play
3 0
3 years ago
A store is having a sale on trail mix and jelly beans. For 5 pounds of trail mix and 6 pounds of jelly beans the total cost is $
inna [77]

The cost for each pound of trail mix and each pound of jelly is given below.

Step-by-step explanation:

Let t = cost/pound of trail mix

Let j = cost/pound of jelly beans

5t + 6j = 35

3t + 2j = 15  =  > 2j = 15 - 3t

5t + 3(15 - 3t) = 35

5t + 45 - 9t = 35

- 4t + 45 = 35

- 4t  =  - 10

4t = 10

t = 2.5

3(2.5) + 2j = 15

7.5 + 2j = 15

2j = 7.5

j = 3.75

7 0
3 years ago
J'aime rendre la vie des gens difficile si vous n'aimez pas cette question
Alona [7]

Answer:

No te gustará cuando la gente te haga la vida tan difícil (:

Jus remeber karama todavía está viva

7 0
3 years ago
Read 2 more answers
PLEASE HELP ME there’s a photo:
Lilit [14]
It's the first one, an algebraic expression contains variables
8 0
3 years ago
Read 2 more answers
Other questions:
  • The events A and B are independent such that P(A)=0.5 and P(B)=0.7.
    10·1 answer
  • Can anyone help???????
    12·1 answer
  • PLEASE HELP I'LL LEAVE THANKS:)
    7·1 answer
  • The sum of two complex numbers, where the real numbers do not equal zero, results in a sum of 34i. Which statement must be true
    6·1 answer
  • A cylindrical water bottle has a diameter of 2.5 inches and a height of 12 inches. The water surface 2.5 inches from the top. To
    6·1 answer
  • Pepper Jackie Has 7.5 bags of mulch to cover 12yds2 is edible flowers beds. If she wants to distribute the mulch evenly over the
    10·2 answers
  • Describe in words how the temperature changes with time, where h is hours since midnight. T=50-2h​
    8·1 answer
  • Please help with this one I’m almost done
    10·1 answer
  • The measures of the angles of a triangle are shown in the figure below. Find the
    10·1 answer
  • Help am stuckkkkk please help​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!