For this case we have the following system of equations:
5x + 3y = 17
-8x - 3y = 9
We can rewrite the system like:
Ax = b
Where,
A = [5 3; -8 -3]
b = [17; 9]
x = [x; y]
The determinant of matrix A is given by:
lAl = ((5) * (- 3)) - ((3) * (- 8))
lAl = (-15) - (-24)
lAl = -15 + 24
lAl = 9
Answer:
The determinant for solving this linear system is:
lAl = 9
Plug in 6.5 for x.
-8.5x-3.5x=-78
-8.5(6.5)-3.5(6.5)=-78
-55.25-22.75=-78
-78=-78
Answer:
Step-by-step explanation:
4 x 2 = 8
there fore, it would take 8 $ to buy 5 slices excluding the delvry.
so, 8 x 2 = 16
16$ total
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Answer:
x=5
Step-by-step explanation:
3.5=0.75x-0.25
add 0.25 to 3.5
3.75=0.75x
divide 3.75 by 0.75
x=5
