Let the price of 1 liter of milk be m, and let the price of 1 loaf of bread be b.
3 liters of milk cost 3m.
5 loaves of bread cost 5b.
The total is $11.
That gives us the first equation:
3m + 5b = 11
4 liters of milk cost 4m.
4 loaves of bread cost 4b.
The total is $10.
That gives us the second equation:
4m + 4b = 10
We have a system of two equations.
3m + 5b = 11
4m + 4b = 10
Multiply the first equation by -4.
Multiply the second equation by 3.
Then, add the equations.
-12m - 20b = -44
+ 12m + 12b = 30
---------------------------
-8b = -14
b = 14/8 = 7/4 = 1.75
Now substitute b with 1.75 in the first original equation.
3m + 5b = 11
3m + 5(1.75) = 11
3m + 8.75 = 11
3m = 2.25
m = 0.75
Answer: A liter of milk costs $0.75, and a loaf of brad costs $1.75.
<u>Answer:</u>
W = 30T + 500
<u>Step-by-step explanation:</u>
We are given that water is added in the pond at a rate of 30 liters per minute and there are total 500 liters in the pond to start.
So assuming W to be the amount of water in the pond (in liters) and T to be the the number of minutes that water has been added, we can write an equation:
W = 30T + 500
(W on the y-axis and T on the x axis)
Answer: -4860y^2
Solution:
81 x (5y x 6) x (-2y)
-81 x 5y x 6 x 2y
= -4860y^2
Answer:
In two years, the tree grew 27/4in.
Step-by-step explanation:
21 1/8 - 14 3/8 = 27/4in.
hope it helped :)
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Descending means that the hot air balloon's height is changing at a negative rate. Multiply the rate of change per minute by the total amount of minutes.
The total change in altitude is
-960 feet.
