Answer:
the answer is 30,000
Step-by-step explanation:
If the number is less than 5 you round down, if it is 5+ you round up
In 14 weeks, if you turn both of those into equations you'll get
![y = - 35x + 710](https://tex.z-dn.net/?f=y%20%3D%20%20-%2035x%20%2B%20710)
and
![y = - 25x + 570](https://tex.z-dn.net/?f=y%20%3D%20%20-%2025x%20%2B%20570)
You should be then able to graph this and see that intersects at 14 weeks at 220 dollars
The 8 in 8,000 represents 1,000 times what it represents in 8 or 1's place value.
So ur given the equation 1.44x=4.32
So you have to find x and you do this with algebra
X=4.32/1.44
X=3
So Emily bought 3 notebooks