Answer:
Step-by-step explanation:
I believe the answer is A because equivalent fractions are fractions with different numbers representing the same part of a whole. All of them represent the same part of a whole besides A.
Answer:
B) -2x+2y=-2
Step-by-step explanation:
we have
----> equation A
----> equation B
Solve the system by graphing
Remember that the solution of the system of equations is the intersection point both graphs
using a graphing tool
The solution is the point (6,5)
see the attached figure
Remember that
If a equation is added to the system so that the solution does not change, then the solution of the system must be a solution of the equation added
<u><em>Verify each case</em></u>
The solution of the system is (6,5)
substitute the value of x and the value of y in each equation
case A) x-y=2
6-5=2
1=2 ----> is not true
therefore
This equation can't be added to the system
case B) -2x+2y=-2
-2(6)+2(5)=-2
-12+10=-2
-2=-2 ----> is true
therefore
This equation can be added to the system
case C) 3x+y=20
3(6)+5=20
18+5=20
23=20 ----> is not true
therefore
This equation can't be added to the system
case D) x+2y=18
5+2(6)=18
5+12=18
17=18 ----> is not true
therefore
This equation can't be added to the system
Answer:
second option
Step-by-step explanation:
x + y = 18 → (1)
4x - 3y = - 12 → (2)
Multiplying (1) by - 4 and adding to (2) will eliminate the x- term
- 4x - 4y = - 72 → (3)
add (2) and (3) term by term to eliminate x
0 - 7y = - 84
- 7y = - 84 ( divide both sides by - 7 )
y = 12
Substitute y = 12 into (1) and solve for x
x + 12 = 18 ( subtract 12 from both sides )
x = 6
solution is x = 6, y = 12
It is 160,000 because when you round to he nearest thousand it is 9000 and 4 or less you stay the same and 5 or more and one more, and in this case 9 +1 is 10 and it would and to 160,000