Let red marbles = X.
The probability is 1 out of 5, written as 1/5
1/5 in terms of red marbles is equal to the number of red marbles divided by 5x, where 5x is the total number of marbles.
1/5 = x/5x
Now you have 5x total marbles, x red and 4x blue.
Add 5 more red and the new probability is:
(x+5)/(5x+5) = 1/3
Simplify:
3x+15 = 5x+5
Now solve for x:
Subtract 3x from both sides:
15 = 2x +5
Subtract 5 from each side:
2x = 10
Divide both sides by 2:
x = 10/2
X = 5
There were originally 5 red marbles.
Answer:
2.7 litres of solution
Step-by-step explanation:
2 _ _ _ 3 _ _ _ 4 _ _ _ add one
_ 11 _ _ _ 14 _ _ _ 17 _ _ add three
_ _ 38 _ _ _ 47 _ _ _ 56 _ add nine
_ _ _ 119 _ _ _ 146 _ _ _173 add seventeen
Hope this helps!!!
Since you have two numbers that have a (x) at the ends of them, you add those first then add seven which will end up being 9x+7
Use proportions.
214/236=x/100(100 because it's a percentage.
cross multiply:
23600=214x
solve for x:
x= 11.3(rounded)
11.3% increase
