Kinglilray998
08.01.2021 •
Mathematics
SOLVING BY UNDOING
Juan says, “I see the whole thing a different way." Here is how he explains his approach to solving 4(x + 3) = 20, which he calls “undoing": "Instead of distributing first, I want to eliminate the 4 from the left side by undoing the multiplication.
a. What can Juan do to both sides of the equation to remove the 4? Why does this work?
b. Solve the equation using Juan's method. Did you get the same result as David?
c. Why is it appropriate for this method to be called "undoing"?
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Ответ:
27.22 m
Step-by-step explanation:
The scale factor is:
9/5= 1.8Height of the model according to scale factor:
49/1.8 = 27.22 m