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
IrinaVladis [17]
3 years ago
5

A system of equations and its solution are given below.

Mathematics
2 answers:
Alexus [3.1K]3 years ago
6 0

Answer:

C. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by -3. The solution to system B will be the same as the solution to system A.

Step-by-step explanation:

System A

x + 6y = 5

3x - 7y = -35

Solution: (-7, 2)

System B  

x + 6y = 5

-25y = -50

First equation is same in both system A  and B

To get system B, the second equation in system A was replaced by sum of that equation and first equation multiplied by -3

x + 6y = 5  (Multiply by -3)

-3x -18y =-15

now do the sum of 3x - 7y = -35  and -3x -18y =-15

3x - 7y = -35  

-3x -18y =-15

-----------------------

      -25 y = -50

The solution to system B will be the same as the solution to system A.

Fittoniya [83]3 years ago
4 0
Answer: Option <span>C. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by -3. The solution to system B will be the same as the solution to system A.

First equation of system A multiplied by -3:
(-3)(x+6y=5)
(-3)(x)+(-3)(6)=(-3)(5)
-3x-18=-15

Sum of the second equation of system A and the first equation multiplied by -3:
(-3x-18)+(3x-7y)=(-15)+(-35)
-3x-18+3x-7y=-15-35
-25y=-50

System B
x+6y=5
-25y=-50 </span>
You might be interested in
Can someone help me with this ?
Virty [35]
Mark drove for 5 hrs
pranav drove for 3 hrs

Distance = speed x time
Pranav =50kmh x 3hrs
= 150 km
* note that they drove the same distance

Speed of mark=distance / time
=150 km / 5hrs
= 30 kmh
3 0
2 years ago
Barb is making a bead necklace she strings won't Whitebead then three blue beads that one white bead and Soren write the numbers
storchak [24]
Can you repeat the question please?
4 0
2 years ago
Can someone help me with two questions in algebra?
Lady_Fox [76]

Answer:

yes?

Step-by-step explanation:

ffgfffffggggggttt

3 0
2 years ago
Read 2 more answers
All the dimensions of a triangle were multiplied by the same factor. If the base of the triangle went from 1 centimeter to 3 cen
timama [110]
The answer is 9.

To calculate this, we will use Galileo's square cube law, used to describe the change of the area or the volume of the shape, when their dimensions increase or decrease. The formula used for change of the area is
A_2= A_1 (\frac{l_2}{l_1} )^{2}
A₂ - the area after the change,
A₁ - the area before the change,
l₂ - the dimension after the change,
l₁ - the dimension before the change.


It is given:
l₁ = 1 cm
l₂ = 3 cm

Let's use this formula for the mentioned triangle:
A_2=A_1( \frac{l_2}{l_1}) ^{2}  =A_1( \frac{3}{1})^{2} =A_1*3 ^{2} =9A_1

Therefore, the area of the triangle was multiplied by 9.
8 0
3 years ago
In a trivia game, you lose points for incorrect answer. You answer the first 3 questions wrongs. Your score after the 3 question
Ksivusya [100]
Each incorrect answer is 25 points
5 0
3 years ago
Other questions:
  • Hunter and Logan built small sand towers on the beach. Hunter built 20 towers, and Logan built 9 towers. Then, the ocean water c
    10·1 answer
  • Identify the roots and state the multiplicity of the each root for -2x^3-8x^2+6x+36=0
    5·1 answer
  • On a coordinate plane, a line goes through (negative 4, 4) and (4, negative 2). A point is at (6, 0).
    10·2 answers
  • When 6 is added to the number that is produced by tripling the number x, the result is equal to 2 times the number that is 3 les
    14·1 answer
  • If x + 4y = 18 and x - 4y = 2, then x =? <br><br> A) 2<br><br> B) 4 <br><br> C) 5<br><br> D)10
    9·1 answer
  • A plane is heading 25° west of south. How many degrees south of west is this plane flying?
    13·1 answer
  • Which statement is true?
    10·1 answer
  • Plzzzzzzzzzzzzzzzz help me I’ll mark you brainlist
    11·2 answers
  • What is this please help me!!!! <br> X+3x=9️‍
    10·2 answers
  • Find the prime factorization of 420​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!