Let R and B be the number of red and blue marbles respectively.
Then,
R+B = 36
R:B = 5:4
Therefore,
Ratio of red marbles = 5/9
Ratio of blue marbles = 4/9
This means,
R = 5/9*36 = 20 marbles
B = 4/9*36 = 16 marbles
If one blue marble is removed from the bag, the new B= 16-1 = 15 blue marbles and the new total of marbles in the bag = 36-1 = 35 marbles.
The new ratios are
R = 20/35 =4/7
B = 15/35 = 3/7
That is, R:B = 4:3
The reasoning of the student is wrong. When a marble is removed, both the number of blue marbles changes as well as the total of the marbles in the bag. In other words, both the values in the ratio reduce by 1.
Answer:
- To establish a ratio relation you must see the difference hence 9:4 =2.25
- So 2.25, 2.5, 2.11, 3.33, 2.85
From least to greatest:
13:6 ; 9:4 ; 5:2 ; 20:7 ; 10:3
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Answer:
the answer to your problem is c
Let x = # of rent bumps
revenue = # occupants * rent per unit occupied
revenue = (170 - x) * ( 510 + 1.5*x)
in our problem, revenue (the money streaming in)
is the same as the profit, since no cost is given in the problem.
profit = (170 - x) * ( 510 + 1.5*x)
<span>to maximize this we use the derivative</span>
Answer:
2/5
Step-by-step explanation:
Look at where the lines lay on coordinate plane correctly.