Answer:
Step-by-step explanation:
let y=f(x)
y=10x-10
flip x and y
x=10y-10
10 y=x+10
yes its a function because it passes the vertical line test. Yes, it is linear because the slope is constant.
That would be 4x + 42 >= 50 where is the number of cakes sold in a day
4x >= 50-42
4x >= 8
x >= 2
Minimum 2 cakes
By the table, it seems to be that f = 1/2x
14z^2+19z-3
=(14z^2-2z)+(21z-3)
=2z(7z-1)+3(7z-1)
=(7z-1)(2z+3)