First let’s express the total number of marbles as such:
y(yellow marbles) + r(red marbles)=23; y+r=23
now let’s express the relation of yellow marbles to red marbles:
y=2r(2 times red marbles) - 4(4 less marbles); y=2r-4
since we figured out what y equals, we can plug into the first equation we created:
(2r-4)+r=23
now solve for r:
2r-4+r=23
combine like terms
3r-4=23
add 4 to both sides
3r=27
divide both side by 3
r=9
plug r back into first equation and solve for y:
y+9=23
subtract 9
y=14
there are 9 red marbles and 14 yellow marbles!
he then turns around and grabs that money and sticks it for another 9 years,
add both amounts, and that's how much is for the whole 21 years.
Answer:
the second one
Step-by-step explanation:
correct me if it is wrong
Answer:
8 hours long
Step-by-step explanation:
3/4 of the race in 6 hrs
6 divided by 3 equals 2
so 1/4 is 2 hrs, 2/4 is 4 hrs, 3/4 is 6 hrs which means 4/4 the whole race would be 8 hrs
4 multiplied by 2 would give you 8
so the entire race was (8 hours long)
The amount of milk containing 6% butterfat and 1% butterfat are 260 gallons and 65 gallons respectively.
<u><em>Explanation</em></u>
Suppose, the amount of milk containing 6% butterfat is 
gallons
As the amount of mixture of milk should be 325 gallons, so the amount of milk containing 1% butterfat will be: 
gallons
Given that, the mixture of milk is containing 5% butterfat. So, the equation will be....
So, the amount of milk containing 6% butterfat is 260 gallons and the amount of milk containing 1% butterfat is (325-260) gallons = 65 gallons.
