Answer:
The answer is 25
Step-by-step explanation:
Answer:
2.4 or 12/5
Step-by-step explanation:
The slope formula is (y2-y1) divided by (x2-x1).
First, you label each number by their x and y.
-4 will be axis x 1
2 will be axis y 1
-9 will be axis x 2
-10 will be axis y 2.
Then substitute the variable into the formula.
(-10 subtract 2) divided by (-9-(-4)).
Next, solve. Once you solve you will get -12/-5 = 2.4
Finally, simplify the answer. if it is already simplify, that will be the answer.
C because when the number you look at the number you are suppose to round off, if the number after it is 5 or more u add 1 to the rounding number.
Solving a system of equations, we will see that there are 6000 kg of coal on the pile.
<h3>
How many kilograms of coal are in the pile of coal?</h3>
Let's say that there are N kilograms of coal, and it is planned to burn it totally in D days, these are our variables.
We know that:
- If the factory burns 1500 kilograms per day, it will finish burning the coal one day ahead of planned.
- If it burns 1000 kilograms per day, it will take an additional day than planned.
Then we can write the system of equations:
(1500)*(D - 1) = N
(1000)*(D + 1) = N
Because N is already isolated in both sides, we can write this as:
(1500)*(D - 1) = N = (1000)*(D + 1)
Then we can solve for D:
(1500)*(D - 1) = (1000)*(D + 1)
1500*D - 1500 = 1000*D + 1000
500*D = 2500
D = 2500/500 = 5
Now that we know the value of D, we can find N by replacing it in one of the two equations:
(1500)*(D - 1) = N
(1500)*(5 - 1) = N
(1500)*4= N = 6000
This means that there are 6000 kilograms of coal on the pile.
If you want to learn more about systems of equations:
brainly.com/question/13729904
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