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19.01.2022 •
Mathematics
A box is filled with green marbles, red marbles, and blue marbles. The ratio of red marbles to green marbles is 3:1. The ratio of green marbles to all of the marbles in the box is 2:11. Write each of the following ratios using the symbol. The ratio of red marbles to blue marbles.
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Ответ:
red : blue = 2 : 1
Step-by-step explanation:
It is convenient to write the ratios so that the number representing green marbles is the same in both cases.
red : green = 3 : 1 = 6 : 2
Then we have ...
red : green : total = 6 : 2 : 11
The number of ratio units for blue marbles is then 11 -6 -2 = 3, so we have ...
red : green : blue : total = 6 : 2 : 3 : 11
Then red : blue = 6 : 3 = 2 : 1
Ответ:
Step-by-step explanation:
We need to analize the exercise.
We know that the sales-tax rate in your state is 4.5% and the cost of the CD is $18.50.
Then, let be "x" the the amount of sales tax you will pay for the CD.
You can write this expression:
Evaluating, you get that the value of "x" is: