The value of K is 5 because its going up 5 from the f(x) graph
10.99x = 3.99x + 280
7x = 280
x = 40
They must sell 40 T-shirts to break even
Let n be the no. of sides
(n-2)*180/n=156
180n-360=156n
24n=360
n=15
so the no. of sides is 15
Answer:
multiply equn q by 3 .
when u will multiply equn 1 by 3 then you will get,9x+3y=39 and second equn is4x_3y=13 so, y can be cancelled and get the value of x for the first time and by putting the value of x you will find the value of y.
