Answer:
slope =4
Step-by-step explanation:
The slope intercept equation of a line is written in the form
y= mx+b
where m is the slope and b is the y intercept.
Since y =4x+5 is written is this form, we can see that 4 is the slope and 5 is the y intercept
Answer:
25 necklaces
Step-by-step explanation:
each necklace brings $16 profit (20-4=16)
400÷ 16= 25
so, at 25 necklaces, there will be enough profit to break even after paying for the advertising.
I need a little more to work with
Multply both equations by 2 leaving
x + 2y = 8
x - 2y = -2
Add the equations giving
2x = 6
x = 3
Substitute 3 in the top equation
3 + 2y = 8
2y = -5
y = -2.5
