GCF is the greatest common factor
We take GCF of numbers first and then we take GCF for variables
GCF of 4, 8, 4 is 4 because all the numbers are divisible by 4
For variable, lowest exponent is our GCF
GCF of 
is x^3
GCF of 
is y^2
So GCF is 4x^3y^2
Let's say "m" is the manufactoring cost per drill (in dollars).
Then the manufactorer sells it for $4 more, so this would be:
m+4
Then the chain store sells it for 140% of the price is paid the manufactorer, so this would be "140% of (m+4)" which translates to "1.4•(m+4)" or more simply:
1.4(m+4)
P(m) = 1.4(m+4), where m is the initial manufactoring cost (in dollars).
Simplifying, you could rewrite this as:
P(m) = 1.4m + 5.6
I would recommend going to school
Or get a tutor
Or ask your parents
Answer:
opposite angle of trapezoid is supplementary
<Z+<X=180°
<X=180°-72°
<x=108°
is your answer
