Thank you for the free points!!!
Answer:
Step-by-step explanation:
Using the rules of exponents
⇔ 
⇔ 
Given
= 
= 
=
Step-by-step explanation:
Given
(2x - 7) ²
We can see it is in the form of (a - b) ² so.
= (2x)² - 2 * 2x * 7 + 7²
= 4x² - 28x + 49
Answer:
85 + z <= x <= 255 + z
Step-by-step explanation:
An inequality system will be given by a lower limit and an upper limit, therefore it is only necessary to raise an equation for each case, h being the hours worked and z the extra money you can earn by delivering the pizzas:
For the lower limit:
8.5 * h + z, knowing that in this case it is 10 hours.
85 + z would be the lower limit value
For the upper limit:
8.5 * h + z, knowing that in this case it is 30 hours.
225 + z would be the upper limit value
Therefore the inequality system would be as follows, let x be the money earned:
85 + z <= x <= 255 + z
Which means that the money earned will be determined by the previous inequality.
