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Phillip had some bricks. he stacked them in 6 equal piles. which expression shows the number of bricks phillip put in each pile? let the variable m stand for the unknown number of bricks. m + 6 m÷6    m−6    6m

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25