It took Corey 7 hours to paint 280 feet of fence.
1 answer:
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Answer:
He subtracted -5 from both sides, not -6
Step-by-step explanation:
The inequality that we have to solve in this problem is
To solve the inequality, we proceed as follows:
1)
First, we isolate the term in x. To do that, we add -6 on both sides of the inequality, and we find:
So, this is now the new inequality.
2)
Then, we divide both sides of the equation by 5; we get:
3)
Finally, we change sign to the inequality, so we get:
So, the student's error is that he subtracted -5 from both sides, not -6.
So the equation basically is 3x-2=y. The x intercept is when y is 0. We need to move the equation so it equals x.
3x-2=y
Let's add 2 to both sides.
3x=y+2
Now divide.
(y+2)/3=x
Let's make y=0.
(0+2)/3
2/3=x
So, the x intercept is (0,2/3). We could even look on a graph (below).
3x-2=y
Let's add 2 to both sides.
3x=y+2
Now divide.
(y+2)/3=x
Let's make y=0.
(0+2)/3
2/3=x
So, the x intercept is (0,2/3). We could even look on a graph (below).