3 years ago

How many solutions does the system below have?

1 answer:

4 0

Answer: 1 solution

An augmented matrix for the system is
[2,6,12;1,1,2] where we will call the first two columns A and the third b. A is linearly independent since it is row equivalent to the identity matrix, which tells us that for any b there will be a unique solution (x,y).

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At a concession stand, three hotdogs and two hamburgers cost 8.50, two hotdogs and three hamburgers cost 9.00. What is the cost

algol [13]

You're on the right track. After you get both equations you need to cancel one of the variables. In this situation, it doesn't matter which variable you cancel out.

7 0

3 years ago

{(2,9), (2,8), (-3,7), (-3,6)} is what type of relation?

Fittoniya [83]

OK, the relation. (2,9), (2,8), (-3,7) (-3,6)

Since 2 maps to two values, as does -3, this relation is not a function.

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By the way these points, in this slightly different order,

(2,9), (2,8), (-3,7) (-3,6)

are the vertices of a parallelogram.