Which expression is 4 times as large as the expression 34-15?

(4*34) - 15

4 * (34-15)

4*34-15

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This is how we know were in a pandemic. When the BMX bike company starts selling toilet paper for $7.

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A manager checked production records and found that a worker produced 160 units while working 40 hours. In the previous week, the same worker produced 138 units while working 36 hours.