The augmented matrix of a consistent system of five equa- tions in seven unknowns has rank equal to three. how many parameters are needed to specify all solutions?

It is necessary four parameters.

Step-by-step explanation:

Since the augmented matrix of the consistent system has rank equal to three then the number of free variables is (number of unknows)-rank then there are 7-3=4 free variables. This means that are necessary four parameter to specify all solutions.

use formula for the circle a=3.14

step-by-step explanation:

answer for #1 is c

answer for #2 is d

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