magicalforlife
14.05.2021 •
Mathematics
Anyone know the answer to the first one?
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Ответ:
it's a multiple choice, really.
Step-by-step explanation:
take any prime number for Y and take a number that is a multiple of 3 for X.
Ответ:
Cheaper brand : y = 7x
The original box is $3 more than the cheap one. Proof:
Suppose 1 box is bought of each (x=1),original will cos10 & the cheaper $7
b) Each time he buys a cheap brand he save $3 ($10-$7), on 5 cheap boxes, he would save $3 x 5 boxes = $15