This is a simultaneous question.
To solve this, we have to make up 2 equations based on the info provided like so:
electricity = e
gas = g
600e + 100g = $412 ——(1)
400e + 150g = $293 ——(2)
In this case, it’ll be easier to use the elimination method where you eliminate a variable so you can calculate only one.
Here, we will be eliminating e so we can get the cost of gas.
To do this we need to get both equation’s e to 600, so we have to multiply equation 2 by 1.5:
(2) x 1.5:
400e + 150g = $293
600e + 225g = $439.50 ——(3)
Now we eliminate e by subtracting equation 1 from equation 3:
(3) - (1):
600e + 225g - 600e - 100g = $439.50 -$412
125g = $27.50
g = $0.22.
Therefore one unit of gas costs $0.22.
Hope it helps and have a good day ahead :D
Answer:
What I don’t understand is this a question or a recipe
Step-by-step explanation:
Answer:
Hello again!
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3 / 3.9 = 0.76
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Step-by-step explanation:
Divide 3 by 3.9 to get 0.76.
Hope this helped you!
Answer:
x = 6
Step-by-step explanation:
Assuming the figure is a parallelogram then opposite sides are congruent, thus
3x - 6 = 12 ( add 6 to both sides )
3x = 18 ( divide both sides by 3 )
x = 6
Answer:
x=4,-4
Step-by-step explanation:
