Answer: the cost per unit of gas is $0.28
Step-by-step explanation:
Let x represent the cost per unit of electricity.
Let y represent the cost per unit of gas.
During one month, a homeowner used 500 units of electricity and 100 units of gas for a total cost of $333. This is expressed as
500x + 100y = 333 - - - -- - -- - -- -1
The next month, 400 units of electricity and 150 units of gas were used for a total cost of $286. This is expressed as
400x + 150y = 286 - - - - - - - - - --2
Multiplying equation 1 by 400 and equation 2 by 500, it becomes
200000x + 40000y = 133200
200000x + 75000y = 143000
Subtracting, it becomes
- 35000y = - 9800
y = - 9800/- 35000
y = 0.28
Substituting y = 0.28 into equation 2, it becomes
400x + 150 × 0.28 = 286
400x = 286 - 42 = 244
x = 244/400 = 0.61
Answer:
1/10
Step-by-step explanation:
(4/40)/ (4/4) = 1/10
Answer:
Step-by-step explanation:
Shape Formula Sum Interior Angles
3 sided polygon (triangle) (3−2)⋅180 180∘
4 sided polygon (quadrilateral) (4−2)⋅180 360∘
6 sided polygon (hexagon) (6−2)⋅180 720∘
Answer:
You will have to pay 13.68 dollars.
Step-by-step explanation:
If you take 4.56 you can see that it is automatically 1 dollar because 25% of 4 is 1. After that you're left with 56 cents, so whats 25% of that? Your answer is 14 cents. If you multiply 14 by it comes up to 56.
So since each box is 3.42, multiply that by 4.
-Faker
Answer:
42 should be in the blank.
Step-by-step explanation:
If you multiply 7/8 by 6, watch what happens...
7/8 *6 = 42/48
The denominators are the same, which shows how the equations are probably equal.
I know it might seem confusing because I'm not great at explaining, but I hope it helps! Have an awesome day c:
