Answer:
Step-by-step explanation:
So we set it up like beofre
c=number of calzones
s=number of slices
total of 59 so
c+s=59
total money was 456
9c+6s=456
we can divide both sides by 3 to simplify
3c+2s=152
use subsitution
c+s=59
minus s both sides
c=59-s
subsitute 59-s for c in other equation
3c+2s=152
3(59-s)+2s=152
177-3s+2s=152
177-s=152
minus 177 both sides
-s=-25
s=25
sub back
c=59-s
c=59-25
c=34
34 calzones
25 slices
F(-2)=1 the value for y when x=-2 is 1
Answer:
Mrs. Lawrie forgot the 600,000 in the equation. Answer = 608,573
Step-by-step explanation:
The equation was:
600,000 + 8,000 + 500 + 70 + 3 = 608,573
Mrs. Lawrie got 68,573, while the answer was 608,573
These techniques for elimination are preferred for 3rd order systems and higher. They use "Row-Reduction" techniques/pivoting and many subtle math tricks to reduce a matrix to either a solvable form or perhaps provide an inverse of a matrix (A-1)of linear equation AX=b. Solving systems of linear equations (n>2) by elimination is a topic unto itself and is the preferred method. As the system of equations increases, the "condition" of a matrix becomes extremely important. Some of this may sound completely alien to you. Don't worry about these topics until Linear Algebra when systems of linear equations (Rank 'n') become larger than 2.
