Hayden is planning a party he bakes 21 cookies if he plans to give each person 3 cookies how many people will be at his party

  7 people

Step-by-step explanation:

  (21 cookies)/(3 cookies/person) = 7 person

If you're really challenged figuring this out, you can count out 21 of some object—such as pennies, scraps of paper, or even cookies—and deal them into piles of 3 each. Then count the piles. Working with actual physical objects can often give you mathematical insight not obtainable any other way.

Each pile subtracts 3 from the original amount. We use the arithmetic operation "division" to simplify repeated subtraction.

Knowing number facts such as 3×7 = 21 is very helpful to solving problems of this nature.

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

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step-by-step explanation: