The expression 7•3x is not equal to the expression 21x. You might think that the two expressions are the same since 7x3 is 21 but the first expression is a dot product. This kind of expression includes the magnitude and direction of the vector in an expression, for example, <span>7•3x. The second expression, 21x, expresses only the magnitude and does not include the direction.</span>
So the scale used was
1 inch = 6 feet
Step-by-step explanation:
Given
Length of library on drawing = 13 inches
Actual length of library = 78 feet
In order to find the scale we divide the actual length by the length of library on drawing.
So,
Scale = 
So the scale used was
1 inch = 6 feet
Keywords: Scale, Maps
Learn more about scaling at:
#Learnwithbrainly
I know what it is. it is (3a+4)(a-6)
First start by subtracting:
50-8=42
the new equation is:
6x=42
then divide:
42/6=7
So the answer is:
x=7
Hope this helps!! :D
