Does anyone know how to do this?
1 answer:
Answer:
The best choice is the last choice.
Step-by-step explanation:
There are several errors here. The first is in the first step, where the sum somehow magically becomes a product.
The next is in the next step where the product magically becomes a sum again, and the factor of 2 is distributed over the sum terms.
Finally, the terms containing "ab" and "a" are combined, even though they are not "like" terms. This is the error that has a description among the answer choices. (Blue markup)
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Answer:
Height of an oak tree= 9 meters
Height of a pine tree = 12 meters
Step-by-step explanation:
Given:
The combined height of 1 oak tree and 1 pine tree = 21 meters
Height of 4 oak trees = 24 meters more than 1 pine tree
To find the height of 1 pine tree and height of one oak tree.
Solution:
Let the height of one oak tree be = meters.
Let height of one pine tree = meters.
Combined height can be given as :
-------------[1]
Height of 4 oak trees = 24 meters more than 1 pine tree
The above statement can be given as :
------------[2]
Rearranging equation [2] by subtracting both sides by .
-------------[2]
Adding rearranged equation [2] to [1].
+--------------------
Dividing both sides by 5.
∴
Plugging in in equation [1]
Subtracting both sides by 9.
Height of an oak tree= 9 meters
Height of a pine tree = 12 meters
Answer:
Step-by-step explanation: