yasmin7740
08.11.2020 •
Mathematics
Josh bought 3 bottles of grape juice and 5 bottles of water for a total of $14.50. Mary bought 2 bottles of grape juice and 3 bottles of water for a total of $9.00. How much does the grape juice cost and the water?
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Ответ:
Step-by-step explanation:
Grape juice = gWater = wEquations:
3g + 5w = 14.502g + 3w = 9.00Subtract the 3 times the second equation from the twice the first:
2*(3g + 5w) - 3(2g + 3w) = 2*14.50 - 3*9.006g + 10w - 6g - 9w = 29 - 27w = 2Then, finding g:
3g + 2*5= 14.503g = 14.50 - 103g = 4.5g = 1.50Ответ:
Step-by-step explanation:(7m+7)(7m+2) multiply, 7m×7m+7m×2+7×7m+7×2. 49m2+14m+49m+14. = 49m2+63m+14