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Alex is 4 years younger than 2 times his sister's age. Write a rule that represents Alex's age x as a function of his sister's age y. How old is Alex, if his sister is 11?

Respuesta :

talanmulli

Answer:

y = 2x - 4; Alex is 18.

Step-by-step explanation:

Since Alex is 4 years younger than 2 times his sister's age, and his sister is y and Alex is x, the function of y to x must be y = 2x - 4.

According to the rule, if Alex's sister is 11, Alex is 2 times that minus four. If you calculate that, you get

11 * 2 = 22

22 - 4 = 18

So Alex is 18 if his sister is 11.

strawberrytae45

Answer:

alex is 18 sis is 11

Step-by-step explanation:

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