Question

Solve for x: −2(x + 3) = −2(x + 1) − 4

2

3

All real numbers

No solution



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Question 2 (Multiple Choice Worth 1 points)

A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month.

x = 0.8x + 72

How many people who became members of the site that month were between 30 a

Answer 1

Question 2 (Multiple Choice Worth 1 points)

A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month.

x = 0.8x + 72

How many people who became members of the site that month were between 30 and 40 years of age?

112

288

360

432

Answer 2

Question 1.
Expanding both sides gives:
-2x - 6 = -2x - 2 - 4 = -2x - 6
Therefore all real numbers is the solution.

Answer 3

Question 2.
x = 0.8x + 72
x - 0.8x = 72
0.2x = 72
x = 72/0.2 = 360 = total number who became members
80% of 360 = 288 = number between 30 and 40 years of age