The expression Hallie wrote is not clear, because if 0 is the only number that satisfies p = 4l + 4w + 4h = l + w + h.
But if you meant to write:
p = 4l + 4w + 4h
p/4 = l + w + h
then she could get something different.
Answer:
The expression (w + h) + p/4 should follow the subtraction if Hallie's equation is
p = 4l + 4w + 4h
p/4 = l + w + h
h = -
Step-by-step explanation:
Let us solve Hallie's problem.
She can use the equation:
p = 4l + 4w + 4h
to determine the sum of the lengths of the edges of a rectangular prism. Because she begin to solve the equation for h, let us solve for h.
This means we are trying to make h the subject of the formula.
p = 4l + 4w + 4h
When you factor out 4 on the right hand side, you have
p = 4(l + w + h)
Dividing both side by 4, we have
p/4 = l + w + h
Now, subtracting (l + w) from both sides, we have
p/4 - (l + w) = h.
This can be written as:
h = - (l + w) + p/4
And that is what Hallie wanted to obtain.
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