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Colt1911 [192]
3 years ago
7

If 2x + 8 = 0, what justifies 2(x + 4) = 0?

Mathematics
1 answer:
musickatia [10]3 years ago
7 0

Answer:

2(x+4)=0

2x+8=0

8-0=2x

8/2=x

4=x

x=4

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200 students in a high school senior class are surveyed about what majors they intend to declare in college. Of the 200 students
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Answer:

  • <u><em>P(M) = 0.4</em></u>

Explanation:

<u>1. Build a two-way frequency table:</u>

To have a complete understanding of the scenary build a two-way frequency table.

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                                  Major in math    No major in math  Total

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No major in CS

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                                  Major in math    No major in math  Total

Major in CS

No major in CS

Total                                                                                      200

  • <u>80 plan to major in mathematics:</u>

                                  Major in math    No major in math  Total

Major in CS

No major in CS

Total                              80                                                   200

  • <u>100 plan to major in computer science</u>:

                                  Major in math    No major in math  Total

Major in CS                                                                           100

No major in CS

Total                              80                                                   200

  • <u>30 plan to pursue a double major in mathematics and computer science</u>:

                                  Major in math    No major in math  Total

Major in CS                  30                                                      100

No major in CS

Total                              80                                                    200

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                                  Major in math    No major in math  Total

Major in CS                   30                              70                 100

No major in CS                                                                     100

Total                              80                             120                200

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