Given:
The system of equations is
...(i)
...(ii)
To find:
The number that must be multiplied with the second equation to eliminate the y-variable.
Solution:
Coefficient of y variable in equation (i) is 3 and in equation (ii) is -1.
To eliminate y-variable the absolute value of coefficients of y-variables should be same.
So, we need to multiply the second equation by 3 to eliminate the y-variable
Multiplying equation (ii) by 3, we get
...(iii)
Adding (i) and (iii), we get
Divide both sides by 7.
Put x=12 in (i).
Divide both sides by 10.
Therefore, x=12 and y=10.
Answer:
42
Step-by-step explanation:
Write 2% as
2
100
Since, finding the fraction of a number is same as multiplying the fraction with the number, we have
2
100
of 2100 =
2
100
× 2100
Therefore, the answer is 42
If you are using a calculator, simply enter 2÷100×2100 which will give you 42 as the answer.
They cross each other at (5,2)
Answer:
Area: 312
Perimeter: 75
Step-by-step explanation:
Area is l·w
20·16=320
two corners aren't filled
320-9-9=318
Add all the sides for perimeter
17+3+3+13+20+13+3+3=75
The correct answer is: $20
Explanation:
3 pounds of hamburger is $6.
1 pound of hamburger is 
Now,
10 pounds of hamburger is 
Hence the correct answer is $20.
