Which equation shows the substitution method being used to solve the system of linear equations?

x - y = 7

x = y + 3

A.

(y + 3) - y = 7

B.

x - (y + 3) = 7

C.

x - y = y + 3

D.

x = (7 - x) + 3

Divide and round to the nearest hundredths place. 0.82 : 9

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Mrs. Barlow's math class took a test yesterday. Out of 80 students, 70% of them passed. How many of Mrs. Barlow's students passed the test?

What's the result of: (2/3) ³

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I just need clarification. If a rectangular prism has the dimensions of 10 by 4 by 6, The volume would be 240 in³ and the surface area would be 248 in² right?