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Mathematics

1 answer:

labwork [276]2 years ago

4 0

Answer:

A) 7 + 4(n - 1)

Step-by-step explanation:

The explicit rule follows the form, Tn = a + (n - 1)*(d), where 'a' is the first term and 'd' is the common difference between the numbers

It says that the first term is 7, so 'a' is 7. It also says that the numbers go up by 4 (adding 4 to the previous number), hence 'd' is 4.

Sub these values into the equation:

Tn = 7 + (n - 1)*(4)

Same as: 7 + 4(n - 1)

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Step-by-step explanation:

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Which of the following statements contain a variable? Check all that apply. A. There are 60 seconds in a minute. B. He is 15 yea

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The answer is the option C and the option D, which are:

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The explanation for this problem is shown below:

By definition, a variable is an unkown quantity. In the Option A the quantity is given: $60$ seconds in a minute. In the option B you know the quantity too, which is $15$ years old. But the option C and the option D does not give any quantity, you don't know the number of pages in the book or the age of the friend yet. Therefore, the answer is the options C and D.