mashedpotatoes28
31.07.2019 •
Mathematics
While on vacation, erika bought 6 postcards, which was twice as many postcards as nathan bought. samantha bought 4 times as many postcards as nathan. how many postcards did samantha buy?
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Ответ:
⇒ Erika bought 6 postcards
E = 6
⇒ Erika bought twice as many postcards as Nathan bought
E = 2N
2N = E
⇒ Samantha bought 4 times as many postcards as Nathan
S = 4N
Before we find the number of Samantha's postcards, we need to find the number of Nathan's postcard. Substitute E with 6 in the second equation.
2N = E
2N = 6
N = 6/2
N = 3
Nathan bought 3 postcards
Find the number of Samantha's postcard
Substitute N with the number of Nathan's postcards, which is 3, in the third equation
S = 4N
S = 4 × 3
S = 12
Samantha bought 12 postcards
Ответ:
Ответ:
the answer is B- Rational Numbers