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
sleet_krkn [62]
3 years ago
10

Which properties justify the steps taken to solve the system?

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
6 0

Answer:

This system of equations was solved  the Reduction Method:


 Step 1: Multiply the equations by the appropriate numbers (The first equation was multiplied by 5 and the other one bye 7), so that one of the variables disappears by subtracting both equations.

 Step 2: The equations were algebraically added and one of the variables disappeared (Resulting in 31a= 217).

 Step 3: The variable "a" was cleared to know its value (a= 217/31= 7).

 Step 4: The value "a" obtained is substituted in one of the previous equations.

 Step 5: Multiply the 2 (coefficient of "a" in the first equation) by the value "a" obtained (2x7= 14).

 Step 6: The independent term "14" is passed to the right member and his sign changes to negative (-14)

 The final step is to clear variable "b" to know its value (b= -17/4= -2).

Step-by-step explanation:


You might be interested in
ASAP ANSWER HELP :)
Allushta [10]
I think it is 80 yd.
5 0
3 years ago
Read 2 more answers
What is the value of x when -25(x - 4) = -55(x - 10) ?
Free_Kalibri [48]

Simplify both sides of the equation

-25(x-4)=-55(x-10)

(-25)(x) + (-25)(-4)=(-55)(x) + (-55) (-10)

Distribute

-25x+100=-55x+550

Add 55x  to both sides

-25x+100+55x=-55x+550+55x

30x+100-100=550-100

subtract 100 from both sides

30x+100-100=550-100

30x=450

divide both sides by 30

30x/30=450/30

x= 15

The value of x is 15


I hope that's help you my friend !

5 0
3 years ago
Read 2 more answers
HELP ASAP !! Select the correct answer from each drop-down menu.
Sindrei [870]

Point A' is at (-2,-2)

Point D' is at (-2,4)

Just multiply each coordinate by 2

8 0
3 years ago
Please help 50 points + Brainliest
Talja [164]

Step-by-step explanation:

AB · BE = CB · BD            Given

CB/BE = AB/BD               Division Property of Equality

<ABC = <DBE                  Vertical angles are equal

ΔABC ≅ ΔDBE                SAS Similarity Theorem


Hope it helps

7 0
3 years ago
Read 2 more answers
Find the inequality represented by the graph ​
Tresset [83]

Answer: y>(1/3)x-3

Step-by-step explanation: The slope is 1/3. The dotted line means it is not inclusive, and the value of k means it is going down three units.

6 0
3 years ago
Other questions:
  • How many vertices are in a polyhedron with 6 triangular faces?
    5·2 answers
  • Which polynomial is factored completely? A.(4x+4) (x+1) B. 3n4 - 15n3 + 12n2 C. 121x2 + 36y D. 2x (x2-4)
    7·1 answer
  • Donald took a math test and got 15 answers correct and 5 incorrect how many questions were on the test
    12·2 answers
  • Find the value of (22/5)²*(5/6)²-√4​
    9·1 answer
  • Bob and mark talk about their families. Bob says he has 3 kids, the product of their ages is 72. He gives another clue: the sum
    13·1 answer
  • What is the exponents laws
    12·1 answer
  • (k + 2)x² -(k+ 2)x - 1 = 0<br>+​
    12·1 answer
  • I need help asap someone please help me i dont understand this question so can someone help me
    5·1 answer
  • Please help me with this
    8·2 answers
  • Find the equation of a line that goes through the points (-3,5) and (5,-11)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!