Use FOIL
28x² -8xy +7xy -2y²
28x² -xy -2y²
Answer:
5/2
Step-by-step explanation:
Two cheaper books = x
more expensive = 1.5x
so, 2.5x=150
150/2.5=x=60
therefore the more expensive book = 90
DrH = DrT + 0.019
DrE = DrH - 0.020
DrH is the most and DrE is the least
Answer:
13.7142857143
Step-by-step explanation:
If you need to round then do so, or i will comment the rounded version if needed.
