Taylor tried to solve an equation step by step:

7 (y+4.5) = 32.5

7y+4.5=32.5 step 1

7y=28 step 2

y=4 step 3

find Taylor's mistake

If the following system of equations was written as a matrix equation in the form AX = C, and matrix A was expressed in the form [a c b d], find the value of a - b + c + d.

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What is 100000000 divided by 9 then times 6

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What are two expressions where the solution is 19

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10 kilograms = ? grams