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
1. Is the function g(x) increasing or decreasing over the interval -2 < x <-1?
Sergeeva-Olga [200]

Answer:

g(x) increasing

h(x) decreasing

Step-by-step explanation:

Since the value of y gets larger as the value of x increases over the interval -2 <x<-1 for the function g(x), the function is increasing

Since the value of y gets smaller as the value of x increases over the interval -2 <x<-1 for the function h(x), the function is decreasing

5 0
3 years ago
What is the Value Of X,
Zina [86]

The value of x in the figure is 9.72

<h3>How to determine the value of x?</h3>

The given shape is a triangle, and the value of x can be calculated using the following laws of cosine

a^2 = b^2 + c^2 - 2bc * cos(a)

So, the equation becomes

x^2 = 14^2 + 10^2 - 2 * 14 * 10 * cos(44)

Evaluate the value of cos(44)

x^2 = 14^2 + 10^2 - 2 * 14 * 10 * 0.7193

Evaluate the product

x^2 = 296 - 201.404

Evaluate the difference

x^2 = 94.596

Evaluate the exponent

x = 9.72

Hence, the value of x in the figure is 9.72

Read more about laws of cosine at

brainly.com/question/4372174

#SPJ1

7 0
1 year ago
Choose the correct elevation for the peak shown.
Nana76 [90]

Answer:600

Step-by-step explanation:

it’s the highest point

3 0
3 years ago
Read 2 more answers
How do I solve these equations?
lilavasa [31]

Answer:

Solve X

X=1/2     X=0.5

Solve V

W=0.0260416v

V=38.4W

3 0
3 years ago
Best answer gets brainliest<br> y=0<br> 1. y=(x³+12x²+47x+60)<br><br> 2. y=(12x²- 25x + 12)
kotegsom [21]

Answer:

1. x =−3, -4, -5  

2. x= 3/4, 1 1/3

6 0
2 years ago
Other questions:
  • Solve the following equations if x=4.
    9·1 answer
  • Solve the inequality.
    6·1 answer
  • Oliver owns a paper mill. It has machines that use wood pulp to make paper. Which is an intermediate good?
    11·2 answers
  • Five whole numbers are written in order
    11·2 answers
  • - 5 choose vanilla
    11·1 answer
  • Please help as soon as possible
    8·1 answer
  • Heeelpppppp Meeeee!!!1 will give brainliest<br> Stay Safe and at home
    9·1 answer
  • the relative frequency that the traffic lights will show RED at road works is 0.2. Estimate how many times they will show RED ov
    15·2 answers
  • PLEASE HELP,, MARKING BRAINLIEST!!!
    11·1 answer
  • 7^10 is _____ times larger than 7^8.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!