Sameer is collecting stamps. On the first day of the month, he is given 10 stamps. Each week after than he gets 15 more stamps. Which of the following equations defines how many stamps he has after the nth week? 5n + 5

10n + 5

15n - 5

5n + 15

15n-5 is your answer.

Step-by-step explanation:

1st week => 10 stamps

2nd week => 10 + 15 => 25 stamps

3rd week => 25 + 15 => 40 stamps

common difference = 15

Now,

an = a + (n - 1)d

or, nth week = 10 + (n - 1)15

nth week = 10 + 15n - 15

nth week = 15n - 5

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

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