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drek231 [11]
3 years ago
14

David loves to cook! He knew 21 recipes before starting cooking school and he learns 2 recipes

Mathematics
2 answers:
pishuonlain [190]3 years ago
7 0

Answer:

Sarah is incorrect.

Step-by-step explanation:

By plugging 10 in as 'x' to the equation, we get y=21+(2*10). 2 x 10 is 20, and 20 + 21 is <em>not</em> 42 - it's 41. So, Sarah is incorrect.

ser-zykov [4K]3 years ago
5 0

Answer:

Sarah is not correct because if David already knows 21 recipes and learns 2 recipes per week, then he will know only 41 recipes after 10 weeks, not 42.

Step-by-step explanation:

To see if Sarah is correct, let's replace the y in the equation with 42 and the x with 10:

y = 2x + 21

42 = 2(10) + 21

42 = 20 + 21

42 \neq 41

Sarah is wrong.

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