Amatrix a is given. determine if the system ax = b (where x and b have the appropriate number of components) has a solution for all choices of b. a = 5 −4 4 2

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

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Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.