Answer:
192
Step-by-step explanation:
To find how many phones are expected to be defective, we need to represent the values in a fraction.

x = number of defective phones
Now we can solve this using algebra.
To get the value of x we need to multiply both sides by 8000 to leave x alone.



So around 192 cell phones are expected to be defective out of 8000 phones.
Put -4 in place of x
-4 to the second power is 16 so it would be 16-(-12)= 28
Answer:
-x + 20y
Step-by-step explanation:
trust me.. its right