maddy6882
28.02.2020 •
Mathematics
A cookie jar contains three types of cookies: chocolate chip, oatmeal, and sugar. 60% are chocolate chip. Half of the remaining are oatmeal. If there are 9 oatmeal cookies, how many cookies are in the jar?
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Ответ:
Step-by-step explanation:
(x + 3)^1/2 = 5
⇔
√(x + 3) = 5
⇔
(x + 3) = 5²
⇔
x + 3 = 25
⇔
x = 25 - 3
⇔
x = 22