Can someone explain how to solve the system of equation x+y=3 by graphing?
1 answer:
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Answer:
8.4 dollars
Step-by-step explanation:
The error is in the resolution of the proportion. In fact, the initial proportion is correct:
where x is the total cost. However, the following step of the resolution is wrong. In fact, the correct resolution is the following:
- Multiplying by x on both sides:
- Multiplying by 3.5 no both sides:
And now we can find x:
So, the total cost is 8.4 dollars.
Answer:
Step-by-step explanation:
The slope of a line equals to the difference between points' y-coordinates divided by the difference between their x-coordinates.
That is, if and
are the point of a line,
Then the slope of the line is,
By the given diagram,
,
,
and
Thus, the slope of the given line
=
⇒ Fourth option is correct.