Grant attempted to solve an equation but made an error. What is his error, and which step did he make it in?
2 answers:
Answer:
B. The error is in step 2, combine to make
not
.
Step-by-step explanation:
We have been an image that represents Grant's solution of an equation. We are asked to find Grant's error.
Let us see our given equation by using distributive property .
Now we will gather like terms.
Upon looking at Grant's work, we can see that he combined incorrectly. Instead of subtracting x, he added x to 3x, therefore, Grant made an error in step 2 and option B is the correct choice.
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We know that there are 100 cm in 1 m. We can convert 0.75 m to cm by multiplying by 100 to give us:
Therefore the path before the addition is 75 cm wide.
Mr. Kassel added 20 cm of blocks on each side of the path, meaning that the added width is actually 40 cm total (20 on each side, and there are 2 sides).
So we need to add 40 cm to the original 75 cm:
So now we have the width of the path in cm, the question asks for the width in meters. We can do this by dividing the width in cm by 100 to get the width in meters:
Now we know that the new width of the path is 1.15 m.
Therefore the path before the addition is 75 cm wide.
Mr. Kassel added 20 cm of blocks on each side of the path, meaning that the added width is actually 40 cm total (20 on each side, and there are 2 sides).
So we need to add 40 cm to the original 75 cm:
So now we have the width of the path in cm, the question asks for the width in meters. We can do this by dividing the width in cm by 100 to get the width in meters:
Now we know that the new width of the path is 1.15 m.