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Sati [7]
3 years ago
8

7x+9-13x+4 simplified

Mathematics
1 answer:
densk [106]3 years ago
6 0

Answer:

-6x+13

Step-by-step explanation:

7x+9-13x+4

7x-13x+9+4

-6x+9+4

-6x+13

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Marvin counts six $5 bills. write each value that he counts. what pattern do you see in the one digits of the values he counts?
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Answer: If the number of bills counted is odd, the ones digit is 5; if the number of bills is even, the ones digit is 0.

Explanation

1) Simulate the counting of the bills:

number of bills counted          value              ones digit

1                                             5                         5

2                                             5 + 5 = 10           0

3                                             10 + 5 = 15         5

4                                             15 + 5 = 20         0

5                                              20 + 5 = 25        5

6                                              25 + 5 = 30        0

2) Pattern: you can see that the ones digit alreternate: 5, 0, 5, 0, 5, 0, ...

If the number of bills counted is odd the ones digit is 5, if the number of bills is even the ones digit is 0.
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1 yard = 3 feet, so we would do 3×84, which is 252.

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Adriana, Henry, Malik, and Richard each design surveys to determine the most popular way seventh graders purchase music. Adriana
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