Expand using identities: (i) (2x- 5y)² (ii) (11a + 2) (11a – 2) (iii) (7m + 3) (7m + 3)
1 answer:
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Answer:
Part a)
Part b)
Part c) Standard Daily Rate plus Mileage plan
Step-by-step explanation:
Part a) What would be the cost of the Standard Daily Rate plus Mileage plan?
Let
y ----> the total cost
x ----> the number of kilometers
we have that
For a Luxury car
For x=400 km
substitute
Part b) What would be the cost of the Unlimited Mileage plan?
we know that
The Unlimited Mileage plan for a Luxury car is $105 per day (see the table)
The trip are three days
so
To find the total cost multiply $105 by 3
Part c) Which is the better plan?
Compare
therefore
For this trip the better plan is the Standard Daily Rate plus Mileage plan
