T - ( - 10) = 9
t + 10 = 9
t = 9 - 10
t = -1
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Answer: t = -1
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Answer:
Step-by-step explanation:
Is this y=-x^2 +2?
Here is the graph, in the photo.
Hope you understand
Company a = 22 + 0.07m
company b = 8 + 0.12m
We are looking for the time when the prices are equal. i.e. the price of company a = the price of company b
company a = company b
22 + 0.07m = 8 + 0.12m
22 - 8 = 0.12m - 0.07m
14 = 0.05m
m = 14/0.05
m = 280
Therefore, the two companies will cost the same if you talk for 280 minutes
3ab - 3a - 8 + 4ab + 8
7ab -3a