To eliminate one of the variables the coefficients have to have the same values but different signs.One has to be positive and one has to be negative then you could add them up to get become zero. So in the two systems of equations you can multiply the down equation by -6 to eliminate the y variable but the top equation will have to be the same.
-6(4x + y)=30(-6)
-24x -6y = -180
You can now rewrite the equation as
12x + 6y = 120
-24x -6y = -180 Now you can add the top and down equations to eliminate the y variable.
You can multiply the 2nd equation by either -3 or -6
Step-by-step explanation:
If you are using elimination (imo substitution on this problem would be easier), then you need to eliminate <em>one </em>of the variables. If you are wanting to eliminate x first, then multiply by -3. If you want to eliminate y first, then multiply by -6.
Answer: Step-by-step explanation: The above is a right angled triangle So you take the longest side 9.4^2 - 6.8^2 88.36- 46.24 sqrt of 42.12 6.4899
What we can say with a good deal of certainty is that our sample is biased towards the higher spectrum and that the real value of the mean for our population is lower than the obtained value of our sample. If this is true, we should expect for the standard deviation to be higher than in the population.
