Evaluate the expression without using a calculator. 71 • 9 A. 549 B. 639 C. 719 D. 720
Question
Updated 2/27/2015 9:08:14 AM
Confirmed by debnjerry [2/27/2015 9:05:52 AM]
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Original conversation
User: Evaluate the expression without using a calculator. 71 • 9 A. 549 B. 639 C. 719 D. 720

Weegy: 71 • 9 = B. 639

User: What is the solution to the equation? 7(5 + 9) = 7 · x + 7 · 9 A. x = 1 B. x = 5 C. x = 7 D. x = 9

Question
Updated 2/27/2015 9:08:14 AM
Confirmed by debnjerry [2/27/2015 9:05:52 AM]
Rating
8
7(5 + 9) = 7 * x + 7 * 9
7(14) = 7x + 63
98 = 7x + 63
-7x = 63 - 98
-7x = -35
x = -35 / -7
x = 5

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