Answer
=21−7⋅k
Step-by-step explanation: −7⋅(k−3))
=−7⋅k+7⋅3
Answer:
B. The lines have the same slope, but different intercepts.
Step-by-step explanation:
The solution of a system of linear equations doesn't exist if the lines do not intersect each other at any point. So if there is no solution that means the lines of both equations will not intersect.
Lets look at the options one by one.
For option A:
If the lines are perpendicular, they might intersect at any point so this is not the correct option.
For Option B:
If the lines have same slop and different intercepts that means the lines are parallel. We know that parallel lines never cross each other so option B is the correct answer.
For Option C:
The lines with same intercept and different might also intersect so option C is not correct.
For Option D:
The lines being on top of each other means that the lines intersect on all points. So option D is also not correct.
If a 4000 watt oven is on for 5 hours, then how many kilowatt-hours (kw-hrs) of energy are used?
Solution: We are given that the oven is 4000 watt and it is on for 5 hours.
We have to find the how many kilowatt-hours (Kw-hrs) of energy are used by the oven.
We first need to convert watts into kilowatt's. We know that:
Therefore, 4000 Watts
Now, we can find how many kilowatt-hours (Kw-hrs) of energy are used by the oven.
Energy used by the oven Kw-hrs
Therefore, 20 kilowatt-hours (kw-hrs) of energy are used by the oven.
Answer: 160
Step-by-step explanation:
160 is the answer trust me