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Ipatiy [6.2K]
3 years ago
14

What is the value of the equation below when a=3 and b=7 a2-2b

Mathematics
1 answer:
Flauer [41]3 years ago
7 0
This equation uses substitution 
a=3 b=7
a2-2b
(3)2-2(7)
5-14
-9
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Answer: Ali would need to drive 350 miles for the two plans to cost the same.

Step-by-step explanation:

This question can be solved by creating two equations using the information supplied in the question and then solving these simultaneously.

Let the cost be C.

Let the number of miles be M.

Let the initial payment be i.

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Plan 1:

C = i+R×M

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Plan 2:

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Substituting equation 2 into equation 1:

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